Wow, well it sounds like something i'm going to have to do and I had no idea there would be so many folks willing to do the welding. Bear in mind, this is a fabricating project. there won't be any connect part A to part B kind of stuff, there will be finagling that has to happen, and you will probably cuss. I'll likely start a new thread once I have something to offer. A more complete list of things you'll need, or things that I use, to get one built:
Welder
Grinder/Files
Tape Measure
C-Clamps
Spring Clamps
90 degree welding magnets (for placing stanchions)
Rubber Mallet or block of wood
Speed Square