Also one thing to consider with the cheaper trailers is where will you be keeping it? If keeping it outside in the elements, a cheap trailer will probably not last as long.
Personally I can't keep a trailer outside due to my HOA so I keep it parked in my garage when not in use. It doesn't really take a beating from the elements. This was my consideration in buying a cheap one. The garage thing is another reason why I went with a smaller one (5x8).