Would the balance change if you were in the above scenario?
First, I would really examine what I do during the job that I could change:
- do you go out to lunch with co-workers every day? Change it to 2 days a week and work on your own stuff the other 3.
- do you go on cigarette breaks twice a day? Stop and do your own stuff.
- do you find yourself in waste-of-time meetings? Avoid those.
I'm not 100% sure, but 90% sure you can probably find jusst an extra 5 hours a week you can spare.
Second, I'd start looking for a new job. This doesn't mean quit today. It means start writing down ideas of other you can do for money. Start today (writing ideas) and see where it takes you