If this property management company was not proven to be a crucial need, there would have been no reason to find it in the first place. A successful businessman, by definition, is the one who has his hand in every investment he owns but his head only in planning new ones.
In other words, when it comes to all hectic detailed issues of managing a property; whether it is maintaining it, finding tenants, money collection and whatever logistics, a successful businessman would certainly prefer these done by those specialists with a minimal percentages in return. In contrast, he would busy himself in creating new investments that would return him tens and hundreds as compared to that minimal service costs.
In all, time is money and money is honey. Every successful investor understands this simple formula and would be never reluctant to pay specialists save his time, knowing in advance that this time would be invested in creating new assets.