i have a 2006 trinity 6.5x12 open aluminum tubing and i love it. made in stanley wisconsin. dont get cheap angle iron trailer.
i have a 61" zero turn and with the bagger unit on, it barely fits, but still perfect. think i paid $1500 new, worth every penny.
and when you look for a trailer make sure it has enough travel, ive seen the axle hitting the electrical conduit on some with only a half in or so of clearence, junk.