People forget when they rent a trailer that if a trailer is 30 feet long and 8 feet wide that is a footprint of 240 square feet. Subtract from that the bed, table, couch, counters, cabinets, shower, toilet, etc and that is lost usable open space (living area).
So while we love our trailers, it is because we love the outdoors and having OUR bed and house to be in, it is not because they offer a huge living space, although slide outs do increase the usable floor space in a trailer, not all trailer have them. Some have 1 slide up to 5 slides.
The DW and I and our two dogs, one small (40lbs) and a german shepard (130lbs) end up tripping over one another if we are all in the trailer on a rainy day or evening. Our trailer is 26 feet with a single slide.
Ok, I will get off my soapbox now.