I read a piece on Fuel
mileage Trawler v Sailboat, same trip same time of the year, in the End the Trawler spent 900% more then the Sailboat on Fuel
and got the same mileage.
You might find a motor-sailor that you can drop the mast from and install a 16' 4x4 as your antenna mount, Also your radar
reflector, Steaming Light, Anchor
Light ,cross bar for flags and Deck lights
and it will be easy to drop if you need to get under something very low. Then when you get back you can put the mast back on and sell it .
Best of luck on your Trip, it is a Trip i would love to make myself. Fair Winds