one cord is not a very hard requirement to meet..
most any tandem axle trailer will work once you put up sides.
it's really important to find a trailer with brakes. it's not what you can pull, but what you can stop.
stay away from mobile home axles ...
5 lug axle = 3,500 lb rating
6 lug = 5,000 lb
8 lug = 7,000 lb
condition of tires limits what your trailer will handle.
deals pop up on craigslist all the time... the really good deals go quick... sometimes within minutes...
took me 6+ months of searching before I found mine.... a tandem axle trailer with brakes and 7k lbs axles.
went to look at a trailer with HD axles... it was Heavy Duty and cheap... but way too ugly! (home built) ... got to talking with the owner... who just happen to have another trailer stored at his fathers place 150 miles away...
drove down and picked trailer up right away...
exactly what I was looking for ... 18ft with dove, tandem 7k axles with brakes, like new 10 ply truck tires, good floor, 2 5/16 ball, frame mounted jack, etc ... the entire trailer was in excellent condition ... paid $1,650... one of the best buys ever!