Replying to Roof rack help

So my parents said for my birthday they would get me a roof mounting system for my car. The thing is, I know nothing about these things, so I need your help!

I'm looking for a solid roof rack that can hold like 4 pairs of skis, and that's isnt a clam that's going to destroy my gas mileage. Also, if it could be like taken off and converted to a bike rack kinda thing that would be really ideal.

I'm looking in the 400$ price range, since I don't want to make my parents spend a lot of money, but if there is something perfect in the 500$ price range then I'd definately help pay