Supreams14
What are you doing with the car? Tandem, Formula D, local events? If you are running sanctioned events make sure the material and cage meets their requirements. There's a big difference between ERW and DOM tubing. Also you have to make sure the welds penetrate both surfaces. This takes time and practice to learn and gets expensive

Mike at S&R does great work, contact him or
contact 23tstang, as it seems like he is offering a good deal.