On Site Manager Compensation - California Apartment (45 units)

[Gustavo Gonzalez]

Wondering if anyone can offer some input for an on-site manager compensation for a 45 unit building in California that I just closed on?  

The previous owner had a relative live in a 2 bedroom 2 bathroom unit rent free.  There was a management company involved but this on site manager did take care of small day to day repairs.  The on site manager plans to leave California in 3-6 months so they will not be an option going forward.  

My management company suggests hiring a part time on site manager at the rate of $15-20 per hour (higher pay depending on willingness of job responsibilities).  The on site manager will be hired under contract by my property management company.

I also plan to place the on site manager to a 1 bedroom 1 bathroom unit.  The property has an office that is currently attached to the 2 bedroom 2 bathroom unit that can easily be "walled off" so I plan to separate it (drywall) as a stand alone office.  

Thanks!