Attorney fees vary for every type of transaction that you hire them for. I would suggest consulting a reputable lawyer and asking him about the fees concerning the specific scope and circumstance surrounding what you're looking to do.
One such lawyer that I know of is Michael Reinhardt, Esq. He's a great Brooklyn Attorney that many people I know have used for their clients (including myself). Feel free to give him a call at 718-377-7798. Don't be afraid to tell him that I sent you!