How much time does the coach spend with my daughter?

This all depends on how much money you want to spend but typically a kid who is 9 years old should be able to have 15 minutes of coaching and work independently for the remainder of an hour.

More coaching is generally better but at some point, there are diminishing returns. Your kid needs time to practice the skills the coach has taught them. Having a coach watch every jump will probably accelerate their development somewhat but mostly your kid needs to try each skill a bunch of times and then get corrective instruction if they aren't being successful.