I suggest getting rid of ones misconceptions and generalizations about what an artist is and how an artist works. Yes, early on (late 70s, early 80s) there were times of little money -- enough for rent (50 to 80 bucks/month) but not for food...thankfully rare, though...I remember a week of living on a 10 pound bag of potatoes (80 cents) and the lettuce of a friend's garden. But I could save up and buy some film and paper. Good times! And eventually, a seasonal US Forest Service job that allowed me to save up enough for a couple photo trips to New Zealand.
Now I am retired from my day job (running a university darkroom) I have a pension and Social Security from a life of part time and seasonal work...always made time for photography. The money from occasional print sales and workshops helps to pay the photo-related bills...platinum, travel gasoline, film, that sort of thing. One boy out of college, another finishes up this year...that will free up some money to get the darkroom finished.
One does what is neccesary when life presses in on art. One makes it work. When I was a stay-at-home-dad and the triplets had not even learn to crawl yet, I made work with an SX-70 instead of an 8x10. As the boys got older, I got out the 8x10 and weaved that into our lives. The boys are moving on and I have my shows, workshops and new work to make.