Just look for a 4 place open trailer. You don't need the enclosed. You can get a very nice aluminum 4 place, drive on, drive off for $2500 or less. Aluma, Triton, Floe, any of the big trailer names will do you good. You could get by with 18', but 20' or longer would be best, and give you future options as well. Personally, I think the in-lines are kind of a pain, and prefer the standard 8.5' wide trailers. But that's just my opinion.