The workmanship looks ok, but there are definately some flaws. It can't be centered and bolted to the axles for one, and it looks as if the camber blocks are rigidly mounted to the caster blocks.
However, the statement was made that someone could make one that is cheaper than Hudy's and it would sell. Well how does $65 (plus shipping) sound? Who all would be interested? What if it looked a little cooler than the Hudy? What if it didn't have a bearing on the caster block but had a machined fit that worked just as well? (keeps the price down).
Just PM me if you would be interested. I think the machinist may be interested in dealer inquiries, too. There might even be a possibility of getting the dealer's name machined into it if there's enough interest.