Looking for advice on managing key resources between Rehabs

[Tony Karns]

I am getting ready to start investing, but I will not be doing the work myself as this investment will be out of state. I got a few questions and would like to understand how others are doing it.

I will be moving to TX , but would like to invest in FL. Do I need a Project Manager? 

Since I am not sure how many flips or rehabs, I will be doing a month; What is the best way to address compensation with the project manager.

While a general contractor is paid by the job, some are very busy and it could be months till they are available, How do you keep a good GC when you are in between deals?