just picked up a welding cart at harbor freight. $50 in store and has 20" wheels... that wheels aren't centered put its pretty darn close to being a bike cart on its on.. all I have to do is make a hitch and tongue shouldn't cost more than $10 usual conduit and air hose fittings
here is a link to the cart
http://www.harborfreight.com/cpi/cta...emnumber=43615
and I flips the bolt on handle bar