Hi Travis !
Thought I would jump in. I have a Pro-Tools bender (HMP200C) and I can do a basic roll bar with no problem. Mine was $640 plus 67.00 in shipping. You do need to pump the handle - but I can bend 110 degrees easily in thickness up to 1/4 inch wall. I have a 6 inch die - but they carry all the way down to 4 in if you wanna go that tight.
Check my build section where I posted pics @
https://lateral-g.net/forums/show...t=5109&page=10
I'd highly recommend a digital level (mine is a SmartTool version) and get the how to bend tubing from Mittler Brothers. In their video they specifically walk through how to measure, setup, bend and check a 4 point roll bar. They provide the math formulas, radius charts and even give a real world way of doing the project with very little math. I watched the video a couple times taking notes, put together my measurements, plugged them into the formulas and nailed it. I found it VERY helpful as I'd never bent anything bigger then brake/fuel lines.
Another option is to do a paper template with measurements - and send those to someone. I used one of our sponsors here Ironworks Speed and Kustom for the hoops I needed that I couldn't bend - and they built what I needed and got them back to me. See page 14 of my build and you'll see those driveshaft hoops.
Good luck and remember - YOU CAN DO IT !!
Jim
PS, you will want to get the mittler brothers tube clamp for the SmartLevel too - man I CAN'T live without that assy !