@Tony Castronovo, I would start off with your goals and what you're looking to accomplish. Because @Michael Le tagged me in this post, I'd like to give you my and input based on my experience with a 32 unit nearby (30 min away).
I decided to have someone within a few miles of my 32 unit manage my property (she manages a larger property). She uses her maintenance guy and does a great job taking care of any property concerns.
As far as pay is concerned, I actually don't pay a percentage of the rental income. Because my property is similar to the 10 unit you described with occupancy and minimal maintenance, and because she already manages another property, I felt the best way for this to work was to pay her hourly, and as needed. I pay her $15/ hour whenever she is handling anything that has to do with the property, whether that is with calls, leasing, or when she is on the property premises (with handyman) for repairs.
This strategy has worked well for the both of us as it has allowed her to continue her "main full time" job and it has significantly reduced my expenses.
Hope this helps.
