Lots of people I know are chasing the same $75-100 three hour bar gig, complaining of the money and lack of more work.
Thanks to the internet and YouTube, there are lots of opportunities to increase your music income.
If you play at a place that draws business owners, look for retail jingle work. Or, team up with a video producer to do original scores for YouTube productions. They're everywhere.
This is work that didn't exist 5 years ago.
In my case, as a studio player, and industrial photographer/writer, I just combined the two. A great, written to the action on the screen score creates real value in a promotional video.
Think of it! Everything you hear on radio and see on TV or the internet has an audio track; at least 1/2 of which is created on a work station by a musician.
As far as getting paid, the more of the action you can control, the better. If you just provide music as a "hired gun" during an edit, the rate is set.
If you control the entire project, you can "bundle" scripting, production, graphic design, etc. into a package that results in revenue of up to $1,000 a finished minute for the score on a complex, mid-priced finished product. Total revenue can be $100,000.00 on a 15 minute production with a small amount of animation and limited travel. The high end is $250,000.00 plus.
Most of my work is in that range.
Money depends on the size of the project (and the size of the client) as much as complexity.
A little imagination, and the ability to stay up for 30 hour stretches at a time (plus nerves of steel) makes the cash register ring.
Russ