Hey Hitchup,
I hear you on working up the numbers. I can't do it (yet) either...but it sure was fun towing with a buddy's! For me, I think it will be more appropriate when I'm retired and/or fulltime in the RV travelling from location to location. Until then, my Dooley does a good job and fits well in the driveway!
Actually the two tone SportChassis was purchased at Sundowner Trailers in Oklahoma City -
http://www.horsetrailersdirect.com/
The wheels were also new for SportChassis for 2007.