Now this is just what I have come up with from "watching the other ladies"-
Driving time should equal the appointment time or less.
(What lady is going to drive 3 hours for a 1 hour appointment?)
Usually if I drive an hour to get there, I charge $100. (Technically this is 2 hours, adding both there & back.)
This fee can vary from lady to lady.
So if I spend 2 hours total driving- my required minimum appointment time is 2 hours.
(Totaling 4 hours.)
I think that is pretty reasonable.
Now here's your formula...
Total hobby funds = X
Donation = D
Travel Expense= T
As long as you can make D+T≤X.....
And she is willing.... Go for it.
More flavors to pick from, right?
BTW, most ladies who travel that far, will probably want a deposit upfront.
Just make sure you get a well reviewed lady when sending deposits....
But I am sure you already knew that.
Happy Hobbying to you