Remember what I do for a living. I generally start teaching at around 3:30 PM. I have to center my day around that fact. On a typical day I go 4.5 hours without a break, which for other people seems like a dream job, barely working. But it's intense, very creative work, and if I'm off my game I don't communicate well, and I get edgy, irritable. Not good. The nature of the beast these days is that no one seems to have much money left over after rent/mortgage, car payments and other things that are more or less necessities. In 2019 toys are pretty much necessities too. Have an old cell phone? You may wake up and find out you can't even get calls. That's about to happen to me. I'd keep the same cell forever if I could, but mine is so old it won't update. TV? As of November we can't watch Neflix any more. The TV, which looks great, won't allow us to watch Netflix or Amazon Prime. No more streaming unless we fine a way to plug in a device that is external.
So my student's parents can't really afford more than 1/2 hour a week, or my adult students, and that means I have to hustle to get a max done in minimum time. And I have some REALLY sharp students. I end up probably doing twice or three times as much work at home, all of which interests me greatly, so it's not a burden. But in those 4-5 hours I teach as many as 9-10 students in a row, from age 6 to 75. So when do I recharge? At night.
LOTS of creative people do this. It's not at all uncommon. Get enough sleep before doing what you have to do, then stay up all night playing. I've been doing this since my late teens. Musicians never grow up. It's a fact.