Welcome aboard. There are a number of 60+ year old
women living aboard. Myself included.
As to type of
boat. A sailboat will in my mind, anyway be less expensive to operate. Smaller engines, cost less to maintain. My 34' sailboat gets 10-12 mpg on a good day. That is very good. A twin
engine powerboat has far more room, but
fuel mileage is 1.5 ish mpg. A cat has lots of room, but two engines and even slips cost more, in many places due to width.
If your planning to mainly stay in marina's with a few
anchor outs, a
trawler will give more space. A sailboat is pretty tight space wise, though I love my little boat.