I'd make more if I chose to gig more - as it is, that $7k-$10K comes from a single band that gigs 30-40 dates a year. In the last 5-10 years, I've done maybe a dozen or so paying church gigs. I work this band because:
1.) the band doesn't rehearse - we are expected to know the charts or be able to read well enough to pull it off. (The book on my iPad has 400+ charts in it, and we never know what's going to get called)
2.) it pays well
3.) the time committment - bang for buck - is really nice.
Basically, I roll out to do gigs that are predominately on Saturdays between 4:00 and midnight (7-11 more often than not) and we have roadies that do all but set up my personal gear. I've gotten out of the church service scene - on occasion I still get a call to play a wedding, or a Christmas or Easter gig, but I wind up turning down as many of those as I take.
And I guarantee I have more fun than the Papa John's delivery guy.