Here's the decision point: do you want to have air conditioning or can you live without it? If you need it, you must have a generator. If not, solar will save you over the long run IF you install it correctly (and that means probably by yourself). Very few solar RV 'installers' will do anything more than what's most convenient for themselves. Do some research and read up on what is most efficient. My solar system provides far more than what you're asking and cost me $2,800. More than a good genset, but little maintenance, no stink and not a drop of fuel.