On our last purchase we did sea trial, began the survey in the water, hauled 2 or 3 hours later, pressure washed, inspected, re zinced and splashed all on the same day - 5-6 hours all told.
We did not paint, it was a 'half-lift' remaining in the slings. So doing at least all that in one day should be feasible... painting in coolish temps is always questionable.
1984 Fast/Nicholson 345 "FastForward"
".. there is much you could do at sea with common sense.. and very little you could do without it.."
Capt G E Ericson (from "The Cruel Sea" by Nicholas Monsarrat)