If you want to be successful, you'll be putting in 15-30 hours a week from February to April and 50-80 hours in the regular season. I personally worked about 30 in the preseason and 90 in the summer.
The hours are totally in the control of the owner/operator. Student Works Painting recommend to work at certain hours/days that are the most effective to produce the most amount of results. Ultimately, as an owner/operator, you get to work your own hours.