Just my 2cents. Agreeing with the idea that the best bang for the buck is two 6v golf cart batteries. True 12v deep cycles are really hard to find. Anything that mentions "starting amps" isn't real deep cycle. Knowing you mentioned no solar, but if you plan on doing any type of long term or regular boondocking, solar is really the ticket. Many posters have different opinions on the value of solar, but I believe many people don't really have their solar sorted out correctly(though they think they do). Apart from all that, getting a small 2200/1700 suitcase size genny would charge you batteries up. I run 450w and four 6v Golfer's and never want for power. I think these are great batteries: https://www.batteriesplus.com/productdetails/sli6v210s
