Terri,
I am an agent and our team buys and sells and rehabs properties for owners who are generally from out of this area. Every agent has management leads. We have done business or watched management done by almost every company around and with mixed results.
I would prefer you to have a very specific menu of charges for different services. Most of our owners think they are saving money finding a 8 or 9% rate instead of ten but practically nobody talks about the entire fee structure. If I manage to beat some poor property manager down to 8% a month from 10% then ostensibly I have saved money. But if the 8%er then charges me a month's rent when every client turns over and you are 10% but charge half a month or a flat fee, I am comparing apples to donuts without realizing it.
Someone who never drives past the properties they manage will cause my owners a lot of heartaches if the rental is now a meth house and we don't know it til the police drag off the miscreants. Yours is a much more complicated job than it appears. There are many options for maintenance and repairs that are rarely discussed or presented in a comprehensive way at the first or second contact.
Bad management is a constant problem for me because no matter how great a job I do finding a property, no matter how good the rent-ready rehab is, bad management will wreck the profitability in a minute. We sell over and over to people, year after year and I am touchy that your profession has such a profound impact on what I do. I hope you do a fantastic job and make a bunch of money!