Facts.career in the arts is certainly a leap of faith, you have no idea if you are going to be discovered. i reckon its best to assume you wont, not to discourage yourself but to help you arrange your priorities.
most people i know who take art commissions do it to help them make money on top of the money they're already making because they want some extra spending money. but most of their customers are going to be friends, and people they've networked with. and for a lot of people that's where it may end, but for other people it may go further, depending on your connections.
its connections that seem to be the key though and thats beyond just art. my sister's gotten a lot of opportunities that someone with her experience as a medical student wouldnt have gotten because of the connections she's made with doctors who want to mentor her
Art is definitely a worthwhile endeavor, and in my mind, no drug can ever replicate the high one gets by creating art, just know, it is a financial leap of faith.
You're basically doing two jobs, one is steady, the other is unsteady and takes way more commitment, at least that's how I view it financially, if I just take the joy of creating art and the art itself out of it.