@Stephen Schroeder it would be fantastic for PMCs to be able to charge owners as you describe, as owners might then truly appreciate everything their PMC does for them.Unfortunately, no one has yet devised how to practically do this.So, PMCs' absorb most office & admin expenses and are compensated for them via the monthly fees they charge their clients.

We use a loan servicing software that has a monthly subscription. 

Hire a loan servicer - plenty of discussion and recommendation on BP on this topic and some recommendations for servicing companies 

So far, they have shown to have the absolutely worse customer service response time.

Quote from @Jonathan Chan: Hi, I'm looking to connect with as many HML as I can who service HML.  

They don’t believe in good customer service. 

Some trash companies have a service for an extra charge where they will wheel it out to the curb, because handicapped and the elderly often can’t do it.

.- Finding potential clients who are interested in investing but may need help identifying great deals.

If you had also spend money on renovations and improvements while occupying those should have gone into service then as well. 

Found T&H realty services to be pretty interesting as they provide both buyer brokerage service (to help me find deals) as well as do property management i.e. they are not full turnkey provider necessarily, but reduces some of the hassle for me I guess as an out of state investor.