Ya know I've been considering taking on more jobs, but the biggest challenge is still being available for weekly meetings. Still need to appear in zoom calls on video for a status report.
I did 3 software jobs at the same time for a period of a month. But I was actually working full/part/part so it was kinda back breaking - but I was being paid as a consultant so I was actively working hard..
I managed four concurrent "half-time" gigs once.
Probably my most lucrative month ever.
Find jobs that don't require that nonsense. They do exist. I don't have weekly meetings, and haven't seen my co-workers either physically or on a screen in over a year.