Pricing for dom/sub content

So I have a new potential buyer I’ve been talking to continuously since last night. We vibe well, he respects my boundaries, and I am very interested in making content for him. The problem is, we haven’t discussed pricing. He came up with “rules” for me to abide by each day which consists of sending a pic of my feet in the morning and before bed. This was something he asked beforehand if I was okay with, and I am. But I’m kicking myself because I should’ve brought up pricing then. Now I’m wondering how do I approach this topic and how much do you guys charge for this kind of consistent content? We’re only one day in to our “relationship” so I want to make sure I set the ground rules as soon as possible. Ya girl’s just trying to make some side money for college 🤷🏻‍♀️