Natural gas and propane is best with all things considered. Fuel does not go bad like gasoline and diesel can. It takes a bunch of batteries and solar panels to run very much at all. Solar panel or two to keep the generator starting battery charged when not being used is a good idea. Get a name brand genset. Parts and service will then be possible. Then again, if funding is a problem, get what you can. Probably a lot of people would be happy to have a cheap generator right now.