I am new to this solar deal also, I've been reading and asking question the last week or so. I wanted to go portable also but quickly realized that the portable systems are overpriced and small. From what I have read if you must have portable then get a couple 100 to 120 watt panels and hook them together with hinges so they fold up. I have seen a few posts where guy are using C clamps and wood slats to make quick supports for panel tilting. Another bonus is once the system no longer needs to be portable it can be easily secured to the trailer roof.