Solar grids, do not need maintenance... the crystals on top might need some cleaning from now and them... but thats like the rest of the house, that needs cleaning most of the times...
Other electrical maintenance for my solar grid running from 2007, is 0 so far...
Even that, you dont have to be fully autonomous.. you can use backup from an electric company, (which will rarely be used anyways... )
Or make a hybrid wind/solar system... that can keep batteries fresh during the night... (wind power)
I'm all for solar. The question is whether to buy a stationary house or a mobile home? I think mobile is better than stationary in a lot of cases but in any case the home needs to be capable of generating it's own resources such as electricity and water.
I think as of right now the cost of a house if $300,000 is just too high unless you have a family. If you have kids and a partner then maybe it makes sense to be stationary and settle at some specific location. If you're mobile then buying stocks might be better because dividend aristocrat stocks tend to pay good yield and are some of the safest stocks I know of. You can even go with municipal bonds if taxes are considered as these can offer a tax free or tax efficient investment option.
Let it be known that these are just my opinions and are not investment advice. I do not give investment advice. I am simply stating what I would do if the option is between buying a house in today's market or buying dividend stocks. I would choose the dividend stocks today and wait for the housing bubble to collapse or for 3d home printing technology to arrive.
mobile is in my opinion for younger people with no family.... probably a stationary house, would make things more certain... but i havent thought of it well enough... mobile looks more free... and it might make someone more happy in the long run.
It really depends on the size of your family, what kind of family you're trying to have. It's possible for certain families mobile will make more sense. In the case where you work remotely then I fail to see the benefit of being stationary even if you have a family. Education, friendships, work, all can happen remotely.