Most people that live aboard a boat have a great deal of boating experience before they even attempt such a feat. Living on a boat is nothing like living on land and can be very dangerous and expensive. Before spending 150K on a boat that you might not know how to sail I would invest in some sailing lesions and spend about 3 years getting used to being on a boat for longer then a weekend.
If you're not planning on sailing it all that often consider a houseboat or something that will not require the constant upkeep of such a large offshore sloop.
Just my thoughts...