Possible alternative
The points that require focus were made: roof real estate and battery storage. I really don't think you have sufficient roof real estate for 4 large panels but I've been wrong before. I see the real problem in battery capacity storage. That being said, I have room for 4-12v batteries under my steps. How the heck you deal with the two in the back escapes me, but the rack space is there.
IF you went with lithium and IF you get enough sun to complete a bulk charge (big IFs), you may still need your generator to 'top' them off. They have a different charge profile but you get more usable AMP/h out of them.
Shop around. I got a very reasonable quote from Discount Solar when I was in Quartzsite, AZ. I almost pulled the trigger until I realized two things:
1) I honestly don't know how long I'll stick with this full-timer gig and solar has a payback period that should be reached before you can start saving money. ROI doesn't exist unless you have excess capacity you can sell.
2) Solar only makes the most sense in places that receive a lot of sun. That limits it to the southwest and 'possibly' FL. FL tends to get a lot of overcast rainy days. I intend to see the country and not limit myself to those areas. That limits solar usefulness and lengthens its payback period.
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