Cute name :D
I can't speak for every mouse, since Yankee (my mouse) is my first and only one, but he loves coming out to play. If I walk by his tank and don't at least pet him, he'll climb up his water bottle and hang on the metal-mesh lid until I get him out.
As for the money thing, we're pretty low on money too at the moment, and that's never affected Yankee. Like I said, It's about $3 a month to feed him, I use shredded paper for bedding, and I buy him some chews/toys and such pretty frequently. The most expensive thing was the wheel, around $15 like Neight said.
The things I currently have in Yankee's cage are: A wheel, a little plastic igloo, a crittertrail tunnel (just laid on the ground for him to run in and out of, I would never use an actual crittertrail cage) food bowl, water bottle, a small ceramic flower pot (he likes sleeping in it) and I'm getting him a hammock. With the exception of the wheel and the metal-mesh lid ($10), I didn't pay more than $4 for any of it, though my mom is exceptional at bargain hunting :P I like to switch his toys up every 3ish weeks, to give him something new for stimulation.
I also think it's worth mentioning that if you call around to family and friends, you could probably get an aquarium for free. Mine was just sitting in my uncles front yard when I walked down one day, and he was happy to give it to me-said it was an eyesore, lol. 10 gallons is the idea size, if you wanted to use an aquarium.
ETA: Totally random, but if you do get the mouse, I would reccomend not getting him a hamster ball. Some people think that mice would like them, but more often than not, it only causes stress to the mouse. One person I know of actually had a mouse have a heart attack from being in the ball O.o
Last edited by September; 01-29-2013 at 10:18 AM.