I can not think of a boat in the length you are looking at that has a mast that can lowered without a crane. i have a 33' mast on my 29' boat. they just get longer as the boat gets longer. Getting enough leverage to hoist and lower a mast of that length is nearly impossible. It takes two people and 50' of line for me to raise the mast on my Nacra 17, and it is designed to be raised and lowered.
Sailboats also carry a fairly limited amount of fuel on board. Their primary propulsion is the sail.
you may find yourself refueling more than you think.
you might want to look into trawlers and not sailboats.