I have a Silent Spinner wheel for her and I think it was the regular size, but it's definitely a good size for her when she gets on it her back is not bent. It's far larger than the wheel I used to have for my mice so I think it's correct sizing for her. I'm going to have to do a bin cage I think because I can't spend a lot of money on having a cage shipped from Europe. I'd rather keep that extra cash as money for a vet if she needs one again soon, so I don't mind making a cage myself for her. As for tubes, I was thinking just enough to make a connection. Maybe I can figure out making vented tubes, too... or maybe that one I can convince my husband to do!
Thanks again for all the advice and input! I'll post a cage in the cage thread when I've made it and when she's living in it (it looks like I have a while before she's old enough). I'm actually looking forward to trying my hand at hamster engineering!