How much would it cost for a lawyer to check out a contract?

[Ethan McRae]

My investment partner and I would like to househack together. I am in the process of putting together a contract, however, I would like a lawyer to look it over and give us some feedback on what else should be included. 

I am curious to know how much this would cost. Im sure it would take less than an hour of a lawyers time so I am guessing this would just be a few hundred dollars? Furthermore, where can I find a lawyer for this?

Also, what exactly makes a contract legally binding? If we both sign off on the terms of the contract, does it then become legally binding or would it have to be approved by a lawyer for it to officially become legally binding.

Many thanks