I don't have one with a store bought interior, but I do have a 7x14 Pace trailer that I can carry up to 4 bikes in. I put a cabinet across the front and we wired it with 30 amps of power. Additionally it has 12 volt lighting. We (my son Jeff, Gene, and I) used it in Moab this spring. We left the bikes outside and slept on air mattresses on the floor. We stayed at a KOA campground so we didn't have to worry about the bikes and had 30A power to boot. I have a small microwave inside of it as well. It was a bit crowded, but all in all not a bad way to go.
I would look closely at the load issue. I have never weighted the trailer loaded, but can assure you that it is heavy when loaded and although it doesn't put a strain on my truck, it is only because I have a 3/4 ton 4dr 4x4 Sierra with a Duramax diesel backed up with an Allison transmission.