Whether or not A/C is a necessity will depend on how you plan to use the boat. We are from SE Texas
and sailed the tropics from Caribbean
west-around for 5 years, now in the Med for the past 2 years. If you plan to spend a lot of time in marinas
then you will require A/C. If you plan to spend most of your time at anchor
then it isn't so important.
Our boat has 3 A/C units and a 6.5 kw Onan generator
. We often use the A/C to cool down the aft sleeping cabin
for a couple of hours as I prepare dinner when at anchor. We would never run the genset all night or all day to run the A/C. That would burn a lot of diesel
, put too many hours on the generator
and be unnecessary noise
in otherwise peaceful anchorages
. Even in the worst heat of Texas
coastal waters it cools down enough at night in anchorages
to sleep semi-comfortably as long as you have a fan blowing right over your head
. But marina life absolutely requires A/C.