Yes, I have a garage, but it's not heated.
Most of the snow I get is from driving on the road in front of my house and up the driveway. So a car wash isn't really an option.
If I do go to that car wash however, and give that girl a ride in my car, a wheel imbalance might actually add to the entertainment factor.
I don't think just rinsing the rims using a garden hose alone will do much of anything.
Just to clarify, the snow inbetween the spokes themselves isn't the main problem, that is cleared relatively rather quickly.
Where the wheel imbalance comes from is snow sticking to the inside of the rim.
And when I say stick, I mean it's caked on good enough so that a little bit of water running over it or even a light sweep of a brush isn't going to remove it.
It's somewhat similar to having some ice stuck to your windshield and having to scrape it off, although not quite that sticky.