I am in the same situation.
I have spent most of the last decade living in vans and truck campers. I choose to live in these vehicles. I don’t do this because I am homeless or poor. I do this because I have always felt rent is a scam. When I rent, I am only paying for a kitchen, a shower, and a place to sleep. My van offers the place to sleep. My van/work act as a kitchen and the gym is a place to shower.
I spent most of my 20's living in a van and traveling around the country. At age 27 I decided to buckle down and get a real job. I am now 31 and recently cashed purchased my 2 acre property. I would like to retire on this property by 40 years old, at the latest. Right now make $75k a year and live off $1000 per month. Most of that money goes to food. Once I get my garden started my food bill will drop significantly and I think I will live off $600-800 per month.
My retirement plan is to buy rental properties. As much as I think rent is a scam, people will pay for housing, so I am going to capitalize on it.
I always try to tell people there are other ways to live but they always have excuses.
The biggest budget items that I have cut out living this way.
Rent: $400-$800 per month. saved by living in a vehicle and soon to be a yurt
Cell phone: $75-100 per month. free service plans exist. Right now I use Freedom Pop which is a free service in the US. It's not great but it works.
Internet: I don't know what people pay for internet, I use free sources.
Food: *Hopefully* I can save 200-400 per month on food once I get my garden up and running. I would like to not have to buy food at all but that is a few years away. The disadvantage of mobile life is you are reliant on the food systems.
Credit cards and other debits: $100-$300 per month. I live debt free and make cash purchases.
I save up to $1500 per month just by cutting out the major expenses most people don't think they can cut. This savings equates to $18,000 per year or $25000 per year before taxes. A majority of Americans can give themselves a 50% raise just by leaving a non traditional life style(I don't know what life cost in other countries, so I can only speak for US cost)
Also, if anyone is interested in living in a vehicle to save rent. www.CheapRvLiving.com is a great site. It is built and occupied by friendly people living in vehicles.