I used to do art commissions on the side (usually in between studio contract work), most of which were from furries or people who wanted art commissions. They were usually single or double-character commissions, and they paid handsomely (I would get anywhere between $250-$3,000 per commission). Most of the customers I had were calm and polite, usually providing reference material for the characters they had and what they wanted.
While the commission could be anything that they like, they had to provide any reference that I needed to complete it. More characters would cost extra, as it would complicate the process. And, while NSFW was fine to an extent (want your character in a bikini holding a volleyball? Cool!), my limit was the hardcore pornographic stuff, as it got strange very fast.
Eventually, the studio work had come in more frequently and I had to close my commission store (because trying to juggle the two was not possible). But, there was a time when I did consider making this side hustle a more permanent fixture.
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