At a certain size bottom it makes more sense ion my opinion to use a hard paint like Trinidad, but every few seasons only. Haul and scrub annually, renew the sink and clean the prop without the expense of being blocked. Use the savings to a diver to scrub it once every 10 days.
For a 35 foot boat you save each year you don't paint:
no blocking - about $350
, masking - about $250
No bottom paint - about $350
No paint application - about $350
That's about $1,400 saved.... and if the diver is $75/dive that's 18 x 10 days - 180 days which is 6 months and you gave someone work (diving) and didn't foul the environment
or add weight to your boat.