Start with people and use
A couple making weekend trips has a different space requirement than a family hosting guests or an owner entertaining clients.
Think beyond LOA
Beam, layout, hull form, storage and deck arrangement can make yachts of similar length live very differently.
Decide how much operation you want
As size and systems complexity increase, docking, maintenance and crew considerations can change. There is no universal length at which every owner suddenly needs the same staffing model.
Account for where you will keep it
Slip availability, marina limits, draft, bridge clearance and home-port economics can make a theoretically attractive size impractical.
Buy for the real mission
The best range should solve the trips you will make most often. Do not optimize the entire purchase around a rare edge-case trip unless that capability is genuinely important.

