You only need a few; I have a Patreon for my comics and so far I've gathered about eighty people willing to pay $1-5 per page, times 6-8 pages most months. Which covers most of my rent and expenses; doing private commissions fills in the gaps. They mostly have IT jobs and like the stuff I'm putting out for free enough to support it, fifty bucks a month is a drop in the bucket compared to what they're paying for rent in SF or Seattle or whatever.

And I am absolutely nobody, I have all of like 1700 followers on Twitter, and am pretty much absent from other corporate social platforms.