Well it can't be done cheaply that's for sure. You're either going to be eaten alive by the exchange fees, or eaten alive by the fees a launderer charge like myself, although that's a one time expense. If you're really looking to exchange this amount, have a look on my listing, send me a PM on the marketplace answering those questions and we can proceed. Generally withdrawing this quantity of bitcoin is not something just anyone can do I'm afraid, or at least not safely.