Before I started professional work with my hobbie, I decided I didn't want to go back to full time employment. I'll do it 1 day/wk or 8 hrs/wk. So that's all the work I accept. Now, I've discovered, I really like teaching quilting classes. This is more play than work. So I do that 1-2 days/wk (this includes the prep time).
I chose to limit my work time to remain retired. And to keep my hobbie, a hobbie----fun, not work. When it's not fun anymore, I can go back to my FT job at $45/hr + benefits--it wasn't fun either, but at least I got good compensation.