My problem is storage. No doubt it'd be much cheaper to get a 4x8 trailer and outfit it for a bike but I live in a townhouse that doesn't allow trailers. I need something that I can 'break down' and store in a closet. Renting a trailer is out as I drive a car. I can get a hitch for the car from Curt, but it's one of those smaller ones rated for something like 200/2000.
So far, beside the TIAB, I've found the Port a Chopper and Bikelug to be similar. One downside of the TIAB is no suspension. I have a trailer shop nearby so they can probably convert it to a torsion axle if I buy it.