Here is a little more info. My MH is small and at weight capacity now. I changed out the bulbs to LEDs a few years ago. Dropped my amp draw by 15+ amps per day. I have a Xantrex Battery monitor and we use .6amp per hour with no lights, fans, TV or furnance running. We use about 35 amps per day if the furnace isn't used. In snow in Yosemite we used 65amps per day.
I put a ladder up to the MH to look for space. I have an area between the satellite decal for future installation and the A/C. It's about 5X6 feet. The fridge vent is about 2 feet away and is about a foot from the battery cabinet which I can drill thru the floor.
So 1 panel of about 100-135 watts should mount OK there. Where is it recommended to place the controller? I suppose it need easy access. Is $500-700 about right for everything?
Oh, no room for anything larger than the group 24 batteries. Limited space.