My old Ingrid 38 flew like spit at 18 degrees with one reef in the main, full stays'l and cutaway forefoot working jib
in about 25 knots of wind
closehauled. Occasional puff above that would put the rail under and just over 20 degrees as I recall
. The kids
were constantly screaming, 'put the rail under again, Dad'!
I'd go with 30 degrees unless you plan on sailing on a lake somewhere. Any coastal passagemaking or offshore
sailing you are bound to hit some weather
and if you want a hot meal, you will need a properly fitted stove to produce it.
Good question! Phil