All depends upon the Owners requirements for comfort, physical needs, cruising area, access to provisions and supplies, etc.
We know a 78 yo gentleman who lives aboard a 20’ Flica. In NC, has a car, rents a workshop, moves occasionally to a new town or marina.
We two have lived 6 months on a 33’er. We cruised from Delaware to
Lake Ontario to
Newfoundland. She is a true open
water boat, and has lots of
fuel and
water tankage, and spares capacity. But she is 16,000 pounds and has a ton of
storage. The Flica would not have worked for us.
Our primary hime now is a 44’
steel cutter, 40,000 pounds. We carry nearly 200 gallons of water and
fuel. We have lots of spare and put provision
storage. We can travel long distances and be self sufficient for months.
All depends on your personal needs.