I bought my conduit bender in Home Depot some eight years ago and it was 25-30 bucks. Make sure to buy one that fits the size of the conduit you plan to use. Oh, and a square pen using only four panels does not need support either.
Electrical Conduit is one of my very favorite things. I use the half inch, and I bought a conduit bender, and better than a hacksaw...a pipe cutter. A hacksaw leaves burrs on cut pipe, but the pipe cutter makes a clean cut. If you are going to use conduit connectors they require a clean cut...