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.