As a Service Manager by trade I can say one of things you could do to "1 up" yourself from the competition is to know what things cost and to have a Service manager on your team. Seems that alot of complaints here are paying high repair bills. I cannot speak for the company I work for but, I can say in the 15 years i've been doing this is most people do not have a clue what it takes or costs to complete certain jobs. If I were going to start my own PM group I would definitely have someone on the service side to look at EVERY property you were going to manage in your portfolio, this may give your owners and yourself a better understanding of where they are on how much life is left in certain areas including, roofs, hvac systems and electrical. We cant foresee every problem, but off the top of my head, series I polybutylene pipe will cause more issues than series II.Generally it was ran incorrectly to start with, instead of adding 90s in the wall it was just bent. Little stuff like this can add big problems later. I dont know many property managers that know these things, So having both ends of the PM spectrum could save you alot of headaches later and potentially save a client when something breaks b/c they will already be aware of areas you let them know about up front.