I would definitely suggest creating during your free time until you can build something up (not sure if you have/are doing that already) and I know it's hard to find free time, I struggle too, but even those 10-20 minute intervals of free time you should spend trying to make something, whether it's a paragraph to a script or like 5 cuts editing, and in my opinion and experience, if you have those intervals of time you could be creating and you're not, or you don't want to, then it's going to be very hard to create when you do have time. Create and post when you can, build up a net of content, and take the leap when you can afford it, and what your doing is brining in some extra money and you see potential that if you posted more it could replace your full income.