Sorry to be a naysayer, but honestly....in less time than it takes one to read all the posts in this thread, you could have the boat out of the water and on the bank, and do it for less than $75 or $80 (US). Buy two "come-along" wire rope ratchet winches; attach with your straps or whatever you have to get to the rear winches; attach the other end to your trucks, tractor, tree, or whatever, and then just patiently ratchet it up onto the bank. I don't think you even need ramps. What everyone is missing is that doing this slowly, will allow the water level within the hulls to leave the same way it entered at the same rate you winch it. The boat will get lighter and lighter as you go. I've moved thousands of pounds of equipment using these with no problem at all (just a bit of time).
I'm really having a hard time understanding the problem here, along with all the elaborate recovery ideas. it's not like you're raising the Costa Concordia!