sheet metal forming machine

I need to design a sheet metal rolling machine to form side panels for a solar water heater panel box, not having done this before I'm in the dark, so I'm looking for info regarding the build of this machine like which bend to start off with - the spacing of the rollers for the next stage of the bend / how to drive all rollers etc. chain or hydraulic / cropping to length / power requirements?

if anyone can suggest a DIY design or a website with above info or maybe some plans that I could modify to suit my needs I'd be very grateful.

thanks
regards
anilam