Patreon is an art thing. Yeah there are games hidden in the closet on Patreon, but they aren't advertising or promoting games, you have to do that yourself, patreon just takes your money.
Artist is another story. Your artistic render fucking your mom is perfectly acceptable on patreon, and they are willing to pretend they don't know she's your mom. They will promote your art, and give you the respect you deserve, for practicing your right to freedom of expression and exchange of ideas. (games are banned for this)
So your artist is going to bring in the most Patreon bucks (depends somewhat on the type of game)
If you choose to commission an artist, and pay them for their work, as a contractor. You're cutting off your own foot. Many artists will work for money, but on a per piece basis, it's unlikely that they will really get into it, and make the project great.
A good artist is going to copyright his/her work, and grant you license to use it in your game. He or she will make money from their art through Patreon, ect. Licensing is cheaper than exclusive, yadda yadda, yadda.
A game isn't just "I fucked mom" it's "Here's how I fucked mom, and you can fuck her too. Try if you dare" and players are like move over bro, i'm gonna fuck her so hard, she'll adopt me. This, my friend is the result of writing. The writing goes hand in hand with the art, til death do they part. Likewise a writer can copyright their work, profit from it themselves, and license you to use it in a game, but it wont be the same if you don't put a ring on the writer's finger.
Making these games is a marriage made in hell, the unholiest of unions produce these demon spawn, breathe life into them and they will serve you well, but they will sense the mere though of divorce, and devour you.
Fucking mom requires more than just words and pictures, you need coders to spread her legs and hold her down while the player does naughty things to her. It was one thing for her to let you back in her vagina, the player is gonna need help. Mom's gonna resist, so you cant just use any coder. You need one who knows how to treat a woman, how to please a woman. One who's into this whole unholy orgy of game development thing.
Each partner brings something to the table. Paying or treating them like prostitutes might get your game off, but it won't bring the deep satisfaction that you can all get from being part of a team, with your mom as the coach. Each and every member devoted to giving her the utmost pleasure that they can acomplish. Each reaping the rewards of her gratitude. No leader telling them what to do, each taking turns being on top, devoted to her satisfaction, and her tending to their needs in return.
