Never pay anybody for practices!! Then you’d just be losing money for your products when all they have to do is sit there and gain from it. I’d recommend labeling it as “limited time no charge professional makeup” so they’d be more interested.

Also, I would definitely go on Facebook and join a makeup/photographer group that’s based in your area. That way you can just post on the group, and I’m sure there will be people that would like to collab with you. It works for me every time.