ya the hydrolic benders are ok from then but the hand pump ones will work for a while till u use it alot or on big tube and the seal goes out in the jack then it costs out the butt for a new seal.
ur best bet if u want a good bender and plan on makeing alot of cages is buy a electic over hydrolic bender,Hausfeld is a good bender company thats what i have in my shop and it works ausome it was pretty pricey thow there cheapest is like 400 too 500 bucks but its well worth it if u want good bends and reliable.
Im fixing too start on my cage in about a week ill post some pics of what it looks like after its done.
But i agree with white its not easy too build a cage well a good cage u can just bend some metal and weld it together and hope it holds but ur better off too get with someone who knows more about it.
Adam