Join the Facebook Community
I would start off your very first group program at $800 (or less). Get feedback, testimonials, tweak the program, etc.
Then offer the program for $1800 the next time.
Once you run it successfully at $1800, charge $2800 and then possibly $3800.
Raise your price after each program.
Determine what the cost would be if someone wants to stay in your program longer.
Will you charge monthly, or in 3 month increments.
What happens when they finish the program?
Will they get to keep access to the program but lose support?
Will they lose access to everything?
Will they have lifetime access to everything including support?
I recommend letting them keep access to the program and the group chat/Facebook group but access not to live time with you. Some group programs allow people to continue coming to all the group sessions. Think about what you'd want long term.