Re: Tools of the Trade...suggestions.
dont buy a cheap welder.
Lincoln, Hobart, and Miller all make a good wire feed mig welder for your use!
I suggest the Hobart Handler 140.
Your going to need a chop saw too. You can get em cheap just make sure you can set an angle with it like a mitre saw.
Tubing benders can be picked up reasonably low cost if you go the manual route.