I'll tell you how I do it. I know exactly what this is, since I write anywhere roughly two chapters a day. Of course I returned relatively recently, am unemployed at the moment, and had some ideas prior to getting started, so take this with a grain of salt. I'll try to summarize here (I am supposed to be plotting out volume 2 of my book series) so I'm pressed for time.
1. Creativity is like a muscle, the more you use it the better it gets. I've held onto this idea. I know some people are creative in bursts, but I consider that epiphanies. Like how you might work on a math problem really long and then instantly know what to do, or where your phone really is, I consider those epiphanies. In other words, everyone has a baseline level of "creativeness" that you could manage daily. This baseline increases the more you work with it.
2. Naturally stretching yourself too far hurts it so you still have to write to your motivation. That is where "tempo" or "writing stride" as I call them myself come to play. The simplest way to say it, if you write something you enjoy and write in a way you enjoy, you will have the least difficulty making a chapter. Really comes down to that.
3. Planning. I tend to leave planning pretty free. Honestly of what I mentioned above plotting isn't something I spend a lot of time on; keeping track of older details is. That way if i suddenly want to add an arc or cut a character I can because its pretty free. Compare that to people who are called "plotters" by "pantsing" opposite: they write as many details in their outline. Then if they get midway and don't enjoy it, it hurts the novel's writing progress.
4. Reading. I have read a LOT of fiction. and I mean a lot. Watched plenty. I have so many plotlines and tropes memorized I have a wealth of knowledge to refer back to. If i get stuck on what to do I can just sort of mimic some other work I have seen before. Will it be good? Maybe. Is it good enough for a draft? Yes.
5. Length. Each chapter is about 2000 words for me. Sometimes a bit more, but I feel this is a comfortable space to write, and I end up writing just enough I still feel i did something without stretching thin. So when days are good I write maybe 2, 3 chapters. I think one day I wrote 4, and was halfway through the 5th but I had to get sleep. LOL. Its really self-motivating when you get chapters done. Especially small ones.
6. Quality. This is the stickler for most people. Most of my chapters are just drafts. I've done enough writing I know there are a few errors, but I trust my readers will let me know. If the errors aren't too excessive, usually people don't mind. And I let my readers know beforehand I'll come back to edit things later if sufficient interest grows. Editing, in my experience, hurts getting back to writing. You spend so much time trying to get each line right you don't add any more words to chapters you should. Better to get it out all at once then go back to edit. Will the story suffer somewhat from lack of editing? Maybe. But will it be finished? Yes, and be in the prime space to edit then. Gotta keep up the writing momentum and that helps with the writing.
People also are happier to read novels where there is a backlog to go through, and you naturally build one the more you write. Of course not everything will be perfect, but this is the writing business not the perfection business. Perfection is edited later, you first gotta get your thoughts out for the world to see. Then, and only then, edit away. Plus, when you come back, you won't have as much "author's baby bias" and can edit it earnestly. People have a hard time earnestly accepting critiques and editing parts they just wrote. Hell of a lot easier weeks, months after you wrote this or that chapter.
Good luck with the writing. Wish me luck too! I left last time from burnout, and part of it was editing and the pursuit of perfection. Don't wish that on any of you. Cheers!
TL:DR; WRITE MY AUTHOR WRITE WRITE WRITE!
PS: Don't worry about the payment aspect of things until you get to I'd say 1000 or 2500 followers. Patreons don't grow that quickly without a sufficient base. And if you were hoping to make a career writing, like most artistic professions, it can take years, maybe up to 10. Think of it like making a new youtube channel. It takes a while. Just write the best you can; your story will attract whoever it will, and hopefully that helps. Don't forget to market it: or talk on forums and social media. Don't throw the book in people's faces, just ask them if they were interested and ask current readers to share it around. It's all grassroots for indie writers. You can also pay to show to others too, but that's an issue of clicks vs payment, and you'd need a decent viewer base already to boost how much you can pay for ads and all that marketing stuff. This is all based on advice I received and read from other writers who made the switch successfully. It might be flawed as things evolve.