Here is a high speed 66 feet motoryacht, which should have a cruising speed of 50 knots with waterjets. A nice feature is the master stateroom where you have a direct access to the swim platform through the bathroom. You also get a sometimes desired separation from the guest cabins because of the central engine room. The engines might be a little too far forward for the length of the hull, so in reality I would like to add a few feet to the foreship since she has a quite narrow hull with a full 26 degrees deep V-shape.
Then nothing will stop her...