We're only three months into our homestead in Portugal.
My partner is Portuguese and we have both spent a lot of time here before moving together, so it's not exactly a whole new world. Nevertheless, it has been a learning curve for both.
• Pro - Great weather and if you go to central or northern Portugal, you get decent rain in winter too. The south is gradually becoming an expensive desert and I would avoid it if you want to do
permaculture.
• Con - Wildfire and invasive Eucalyptus are huge environmental problems. There are often droughts in summer. Make sure you have a reliable well or spring.
• Pro - Everyone wants to help. We have had a constant supply of gifted potatoes, eggs, lettuce, jam, broccoli tops and crops to plant since the day we arrived. Buckets of things appear outside the door and often we are not sure who left them and have to do some detective work. Everyone knows everyone and can recommend tradesmen or tell you where to go to get things.
• Con - Everyone wants to know what you're doing and they gossip a lot. We have made some people bitter by refusing to plough up our plot of land this spring like everyone else. They think it's 'going to waste' because we've left the
native meadow. The veg garden is covered in chickweed and other 'weeds' so that it doesn't dry out, but everyone thinks we just don't know how to do it properly. We have been offered bottles of pesticides or for an old man to come and helpfully spray everything for us - including one who boasted that the pesticide he uses is now banned in the EU because it's so toxic.

People have offered repeatedly to rotovate everything to a lovely, lifeless naked dust or even to come and do all our vegetable growing for us - they are a little confused when we politely decline. I love our garden so much how it is - we have so many types of nesting song birds, swallows, snakes and a thriving ecosystem buzzing insects - they love the wildflowers and I am so confused why everyone wants to kill it or thinks it's an eyesore - we think it's beautiful. So your ways of doing things may clash with 'established' knowledge on many fronts.
Integration - People are very welcoming but don't expect to find 'your crowd', especially if you have moved somewhere remote. Portugal is struggling with rural depopulation as all young people flee the countryside for the cities on the coast. Villages are literally dying as the last of the older generations pass away one by one. 60% of all the houses in our village are empty, abandoned or already a roofless ruin. My partner and I are spring
chickens - we are young - the youngest in the village by several decades! All our friends in the village are old
enough to be our parents or grandparents - which is fine and wonderful in many ways - but there is no-one our age who we could befriend and 'hang out with'. You know... watch a movie, down some beers, shoot the shit! Not everyone needs that sort of interaction and if you are older you may feel differently, but I do miss having a tight friendship group of people my own age.
Also if I did not speak the language I would probably feel very isolated. Being able to talk with people is not only a huge advantage, but makes you feel part of the culture and community. Whatever country you're thinking of, start learning the language as soon as you can - ideally before you move there! It has taken me 2 years to become conversationally fluent in Portuguese, even having the advantage of a native speaking partner.
• Pro - Land and property are cheap. We bought an 11 bedroom traditional granite house with an orchard, a well and a ruin that we're converting into a barn for 150,000Eur. We looked at some houses that were only 20,000-30,000EUR... Hell, there's one for sale in our village for 10,000. If you just want something small with land to grow, you can get great deals, especially in depopulated areas.
• Con - Bureaucracy. We had to change our entire game plan because of the laws in Portugal. The law is very difficult to research online, even in Portuguese. We eventually found out through estate agents and the bank a key detail: you are not legally allowed to live on 'non-urban' classified land in Portugal. They will also not give you a
mortgage for it. Many small adorable houses with loads of land in the middle of nowhere are legally classified as 'agricultural support buildings' and you may face problems if you start living there full time. Due to the way land is developed and classified in Portugal, it's very, very difficult to find an 'urban' property legal for dwelling that is not in a village or town. You may find it hard to find that perfect farm in the middle of nowhere - that was what we were searching for and eventually we had to compromise with a house in a village and the knowledge that we can buy more farming land further up the mountain fairly cheap. It's also expensive/impossible to reclassify land.
Con 2 - After buying your property, you enter a whole new level of bureaucracy. Be prepared for a bunch of taxes, fees, obscure rules and laws that no-one will tell you exist. No-one really seems to know for sure what the rules are and you will hear many different version and get totally conflicting advice from everyone you ask - until after you've made your plans and invested - at which point you will of course learn it's legally impossible! Finding out how to do things legitimately is a constant and exhausting struggle (and usually involves paying dumb fees to some authority). We both speak Portuguese and have the support of my partner's family to help us unravel this stuff and even then it's a total mess. Be prepared for everything to take months and cost a lot more than you'd like - especially if you are looking at renovating a property.
Con 3 - There are loads of grants and subsidies available (this is actually a pro). Finding them and unravelling the absolutely torturous process of applying for them and providing all the right documents is a whole other kettle of fish. We are not great at paperwork and feel that many of these things are out of our reach because we have no-one to help us and can't afford to hire someone to advise.
Pro/con - in Portugal and likely in many other southern European countries, most business needs to be done face to face. The majority of businesses here have no website or online presence at all. You find them by asking around. If you need to have an important conversation, you need to go there and find the guy directly. This can be great in some ways - very annoying in others. It depends what you need. If you want a wood-stove, you can just walk into a metal
workshop by the side of road where a bunch of guys are welding them and speak with whatever random guy you find and he'll be happy to tell you all about what they're doing and show you how they're made. Great! But on the other hand, for administrative matters that in the UK you could do in a few minutes on the .Gov website, you will instead have to do an awful lot of taking numbered tickets and waiting in line in a windowless, beige, Kafka-esque room for 45 minutes - maybe more - the clock on the wall will be broken and time stands still in these places - only to be told bluntly by an extremely impatient middle aged lady behind the desk that you're in the wrong windowless, beige room and the right one is on the other side of the town and only open for 20 minutes on a Thursday... Repeat 5 times until eventually told to go back to the first place. This video is a very accurate portrayal of the reality -
https://www.youtube.com/watch?v=2wtbQUaC9mE
What would we do differently? I would have liked a house with more land adjoined to it. Living in the UK while property hunting abroad was hard. We didn't have a budget to fly out multiple times and take our time visiting loads of potential places. We had less than a week to view all the property that we wanted to see. I would have liked to have been able to check out a lot more, but our situation made that impossible since we were both working full time in the UK and had barely any holiday time to take!
Hope this helps!