Also self sustaining with water purification and can survive in the ocean for at least 20 years with out side help? How
Responses (1)
Well now, you are asking for a pretty good sized book. A "source of food" is a farm, and it would be rather difficult to operate a farm on a boat: too much salt spray. You can either haul food or catch fish, same as sailors have always done.
Water is a problem, as it always has been. There just aren't any easy ways to make salt water drinkable. You can lay a cotton tee shirt or underpants on the surface and most of the salt will rinse off when you pick it up. That is a useful trick for survival, but you wouldn't want to do that for very long.
The house and the floater are two different things, and can be anything you know how to do. I have seen floating houseboats made of pop bottles: www.google.com/search?tbm=isch&q=pop+bottle+island+in+mexico You might notice some of those include plants. I don't know how they do that. Oh, and you might notice they are all very close to land: no open ocean stuff there!
As for money, I have the feeling that the less you spend the better the chance of success.
Self sustaining as in has a sorce of food and other necessary thing (like water and shelter), water purification from the ocean, as in like post apocalypse survive, a floating house as in it floats like a boat or raft, supplies that would be needed to build a floating house (like a raft), how long to get the money to buy the supplies to build the floating hou (estimated cost).