For the main features I would want...
Speed. The boat would need to be able to cruise quickly if we want it to, so we can get to where we want to go during daylight hours.
Draft. A fairly shallow draft would be important to get to all the places you want to go.
Bridge clearance.
It has to be squat enough to do the loop.
Water and fuel.
It needs enough water for a few days and or a watermaker. Fuel range would be enough to make 600 miles or so, as just in case capacity.
Flying bridge,
yes it would need one. A pilothouse as well for the inside helm.
A
covered cockpit with swim step
(I have a cockpit but it's not covered)
A
large salon for comfort,
galley on the same level with stove, microwave, oven, trash smasher.
A
large master stateroom , and a
guest stateroom to stash stuff in.
Two heads, and a
waste processing system for where thats legal.
Both heat and AC, probably
a reverse cycle system would work.
Very
quiet generator
entertainment, sat tv, internet.