Tube bender ideas

I was wondering what guys are using for tube benders. Im seeing alot of custom bent tubes for suspension's. I would really like to make my own tube bender. Ones I have ben looking at are electric mandrel benders. Like, RMD, Ineco, Ercolina. Yes I have machining background so I dont think I will have a problem With making one. If anyone has one, I am looking for some ideas. Like Motor Size, AC or DC Horspower, What type of gear reducer, And some pictures of their set up. These machines are expensive like in the 6,000. to 15,000. Range. I think I could make one for alot less.Thank You, Scott