> What I have learned since is that not many people are interested in having a second job for additional income, unless absolutely necessary.

I just picked up a side job (minimal pay) for both the experience and a small portion of money. The doc that I'm working under is studying some pretty cool stuff and allows me to be super-flexible in the hours I can put in work. 

I need to work on the problem on other side of the coin. I stack on too much work and when I can breathe I try to quickly replace it with more work.