Is it possible to have a Reef tank in the garage in Colorado?

[Jar*Head]

After couple days of thinking and planning on where i should put the tank in the house. It is going to be tough to set the tank inside a small town house. I thought about turn a part of my two cars garage into a fish room and house the tank. But i did not thought about the SNOW . I don't know how insulate the garage is in Colorado but for California my garage super cold during the winter. I guess my question is:

1. Is it possible to setup my reef tank in the garage?

2. Have anyone had there reef tank in the Garage before?

3. What type of problem have you encounter?

4. Do you think it is a bad idea?