On large commercial jobs rolling out of 5's was the most practical way of working.LOL. I remember the arguments here about "real painters only rolled out of a 5 with a grid". Doing insurance restoration we could easily go to 4-5 different job sites in a day with a couple colors at each site. Most the time it was a wall or two, a door, some trim. We always used trays. Brushes and roller covers were washed at the end of the day.