Question: Sculpture Commission Slot (Patreon)

Hello! <3 I was meaning to ask you guys one thing, I'm planning on opening a sculpture commission slot soon, after I'm done with my current projects (including patreon sketches). It's supposed to be exclusive for my patrons, but honestly idk how to make it fair for everybody.

I know that a few people would be interested in sculpture, but I'm not able to take few comms at once. Any ideas how should I do it? I'd love to hear your ideas. :)

Thank you! <3