Would this be a good cage/home for a hamster?

yes but to make it even better you could ensure that you give her extra levels...made with ladders and cardboard or buy a plastic tub and cut a hole and put a ladder down they love space so the more the better. the excersize wheel size will depend on the size of the hamster you get ie a syrian needs an 18cm diameter where as a russian needs a smaller one. also if you buy a hamster potty you can toilet train your hasmter mine go only in there so i only clean this out every other day and the whole thiing about 2x a month as the rest is fine i let mine run in the hallway for an hour-2hours each night they love it but be careful there are no wires for them to chew. nb if getting a small breed be careful it cant slip through the metal bars as many can do this...