To start with, I think I'd take a look into searching Craigslist for deals in your area.
Then, secondly I'd hop into my car/truck and dash on down to this place ....
http://www.ameratrail.com/
and have a looksee at what they got firsthand. I have visited the one in Saint Cloud because it is only a mile or two from my farm and I know for a fact that they have custom built an aluminum trailer for a fellow member of the City Marina who also has a

, except it's a white(gofast)

. Ameratrail also has hard to find stuff for your trailer, like hubs, races, brake parts, seals, bearing buddies et cetra.