Have you considered working short term full-time freelance gigs? You can work a few weeks/months for a client, and then stretch that money out working full-time

Have you considered working short term full-time freelance gigs? You can work a few weeks/months for a client, and then stretch that money out working full-time on your own projects before you pick up the next contract. Repeat as needed. Its not part-time but its not full-time either. HTH and good luck.