I kind of did this once! Essentially I got laid of from a job but happened to have a good money buffer and life was quite inexpensive at the time, so I just thought "fuck it" and went as long as I could without working, I made it about a year.
It was awesome! My mental health has never been better, I wrote most of a book, got pretty decent at Blender, started working on learning to make games... and then I had to go back to work and it all went to shit lol, that was several years ago and I haven't touched any of it since.