The husband and I are retired now and just moved to his grandfather's 60 acres 4 years ago so we are sort of starting over again. But, we had two very successful homesteads before (one in Missouri and one in Texas) so here are some things that proved successful for us. We also found your location has a great deal to do with if you have customers or not. The products that sold well in MO did not sell well in TX and vise versa.
Rare animals - we researched and started breeding a rare heritage pig and then I ran an article about the breed in a homesteading
magazine and the whole thing took off. We loved that breed and are so happy we had a hand in saving it, not to mention it was very lucrative for us. We had a nation wide waiting list for our registered breeding stock and a local waiting list for our processed pork. We met some wonderful people and even ended up sending an entire herd to the country of Haiti to start a breeding program over there. After 10 years or so of this, the hubby got sick and we sold our place to move to a much warmer climate.
There we started a much different breeding program, Guernsey
dairy cows. We did artificial insemination using sexed semen so we had almost all heifer calves and had a waiting list for those as well. I miss those cows so much. They are as loving as a hound dog and are smarter than a horse. We also loved raising and consuming our own dairy products.
Other things that proved profitable, hatching and raising poultry and selling locally; making crafts and selling at craft shows, and writing homesteading articles.
Here we are seniors and find ourselves starting again. I thought I'd be happy with just a small personal garden but I have decided to keep doing what I love as long as I can still get up each morning. So, here's what's in process now:
Orchards: I have planted semi-dwarf apples, peaches, blackberries, blueberries, which have been so successful, I've now decided to put in a much larger berry orchard for a U-pick operation to be operational in a few years. The hubby is an amazing woodworker as a hobby and I love designing beautiful pieces for the home so together we've come up with some beautiful pieces that we want to sell at craft shows. He are almost finished with his new
workshop. Next, we will build my workshop next door to his. I make brooms using his grandfathers 100 year old equipment and I do well at craft fairs. We have a building that is already there so we are doing all three buildings lined up and designed to appear to be a little Victorian village. This will be my office where I weigh up the berries and will have our crafts on display. I also plan to have fresh berry hand pies and other baked goods made from my own berries, topped with ice cream, for any who might be tempted (for a cost of course). I'll have a case full of cold drinks for them to purchase also.
I am also in the process of building cages to start raising
rabbits for our own consumption but I've read about people being very successful with making and selling dog treats with all parts of the rabbit. One woman sells on line and clears, after expenses, $65 per animal. She also sells bags of poo as fertilizer.
I still have my incubator and growing equipment so I might like to get back into raising my own birds and selling them again.
I've heard of people making money off of plants, both garden plants as well as flowers and bulbs. Of course, you can sell extra things you grow at the farmer's markets. Then, there is always agritourism with pumpkin patch, Christmas tree farm, corn maze, etc.
I'd love to hear about what works at your homestead.