When making a tycoon, can you clone in model objects?

I'm making a homeowner tycoon.

When they save up enough money in my game, they are able to buy a garage for their house. The garage itself uses a lot of bricks, which is why I have made it into a model. I tried :GetChildren() and it says 'clone' is a nil value. Perhaps you cannot use models? If this is true, how can I close in something with lots of bricks?

Thanks