I'll suggest you check out a Carrie Craft, this is a
catamaran houseboat and there have been several on the markey (2 or 3) that have been updated and refurbished, they do have steps but a
lift would
work. All living space is on the main
deck and floor. These are old, heavyly built boats and they have been through the
Panama Canal and all over the ICWs and
Bahamas. Probably not for the North Atlantic but more
seaworthy than any other houseboat. All docks and morrings are not the same, and the aft area can take a sling
lift and a lift to the upper deck which on some are really big party areas. Check them out, low draught and beachable too!