I typically spend anywhere from three to four hours a day (outside of my full-time job), if not more, working on my writing. It definitely is difficult to keep making progress, especially since work is pretty draining, but I feel like this is something that many can relate to
I work in IT, so I often have a lot of weekend work as well, so I basically try to squeeze in my writing wherever I get the chance. I would love if the day came where I could focus completely on my writing however.