Thanks! It wasn't that difficult. The big pieces turned out to be standard sizes and shapes from the metal supplier. I cut everything with a hand hacksaw, (except for the 1/2" plate - I got some power assist for that) smoothed the cuts with files, then had a local shop do the welding. Paint was good ol' Rustoleum. It's well within reach of anyone who wants to save some $$$s.
The biggest challenge actually was getting all the dimensions and the design. That's why I thought posting my drawings might be useful to others...