With models
Coordination — the biggest stumbling block. Especially when it comes to TFP. It's one thing when a model messages a few minutes before the shoot to say she can't make it. Without explanation. But when a studio or other space is needed, it hurts that much more.
Then there's the whole chapter of platforms like Patreon, OnlyFans, Fansly and others. Obviously it depends on the content the model presents there. If I had to choose, it'd be Patreon — it has fairly well thought-out Community Guidelines. NSFW is allowed, but nothing explicit or sexual. Which isn't something you can say about OnlyFans, Fansly and similar platforms.
That's why I've decided not to prioritise TFP collaborations. When I do, in the case of a studio or other space it's only with a deposit (rental). As for models with platforms like OnlyFans, Fansly and the like — I've decided not to work with such models. I don't want to support sexual or explicit content.