Vicki - Great site! Thanks for recommending it.
Beth - Makes sense. I'm trying to get my head around all this new information, and I think I now understand that instead of worrying about how to run everything, figure out how to run things the best you can, then make do with whatever doesn't work. (E.g. if I'm somewhere and I want to run the AC, but don't have city power, that's the way it goes. A little extra deodorant, ha.) I think it'll be awhile before I'm doing much off-grid scamping - I remind myself, Baby steps. Get comfortable doing it the easier way and work up to what's beyond that.
The upshot is I gave the go-ahead to my friend on the panel install. Looks like materials will be about $450 since I don't need a new battery - Scamp put in a nice deep cell, and that should be all I need. I get anxious when there are so many unknowns (to me), and I need to just have a glass of wine and settle down!