Yow. Three long sets in one night is a lot. Is that what the cover band scene expects? I can't imagine doing that for decades!
Not in Seattle proper, there's no money to make here at any venue, most will give 45-60minutes and no pay before the next band is on stage. Once you leave town there's money to be made and more stage time. The local casinos are usually great places to play, they pay well, 1800.00 and up a night, plus rooms, and food. Most are fairly new with good FOH and support staff as well.