There are big problems with tiny houses.
-besides the fact they are often too small.
Are they too small? That depends. There are tiny houses and there are tiny houses. Are we talking 70 square feet or 400 square feet? How well do they use space? Are we talking housing for a single person, a couple or, god forbid, a large family?
Let’s assume that the size is sufficient for the number of people living there. The big hurtle for tiny homes is zoning. Frankly, living in a tiny home is often just plain illegal.
The technical issues can be dealt with. Alternative energy can provide electric power. Water can be from any number of sources including rain catchment. Septic can be dealt with using composting toilets and clever gray water systems. Heating is climate specific and include everything from woodstoves to diesel heaters designed for RVs.
To get around zoning issues tiny homes are often built on trailers and treated like camper trailers. That can work, but many locations ban people from living in camper trailers. My own rural out in the middle of nowhere town has such a restriction. People cannot do what they want with their own land.
Personally, I’m tempted to build an “ice fishing shack.” It would be a bit more comfortable than most. When I have to pull it shore in the spring it would make a neat little stealth guest house on the lake. Rules are meant to be bent.