just a quick look here on craigslist for a honda 2000 I for 550

edit quick google search for used solar panels found this

Solar Panels at very low cost, SunElec.com they have a 200 watt "blemished" panel for 600 bucks

if you got the full 85 amps a day based on 6 hours of light then you would be down 15 amps a day at 100 amps useage, so you would have to run a genny every 5 days using 340 amps total battery, or about 150 amps to be at 50 % ( minus never getting a 100 %charge ) discharge and still have about a day to spare