My hubby made Louie's cage out of 5 pieces of glass. It's 3ft x 3ft and has no top since the sides are high enough. Normally I wouldn't recommend putting a hedgie in a glass aquarium because of ventilation problems but this is big enough & open enough that that's not a problem.
Hedgies like to burrow and so I put a blanket over part of his cage...he loves to hide under there & cuddle up with his stuffed animals
He has a wheel, half a coconut to hide in, a house to sleep in, some PVC tube to run thru, stuffed animals & TP tubes. I change his toys around about once a week.
It cost us approx $125 to make just Louies cage (not the stuff in his cage).
I would recommend 2 Sterlite containers (most people use these) that you can connect with a PVC tube. Try to stay away from glass aquariums unless you're going to go with a big 55 gallon or bigger one. They need to have a lot of ventilation. The bigger the containers the better but go with what you can fit (& afford!)
I can't find any pics right now but I'll take some today and post 'em later.