I need them at minimum to have some experience with construction/rehab to point out the areas that are high cost to fix or what's desirable configuration etc.In every market there are varying degrees of risk and reward. 

As far as a heat source goes, you definitely need one in Ohio...and if you have utility gas, you have multiple options that will suffice...having a dedicated furnace is nice, but if the property isn't setup for that configuration you may have some added costs with installation. 

Some of the questions I would ask multiple property managers include:What property type, configuration, location and rent range would you recommend if I am looking for a reasonable return and low tenant turnover?

One headache he has is his tenant would order cable programs, pay per view boxing matches, special games and movies, and he would have to bill his tenant for this stuff separately, and of course if his tenant downloads pirated content he would be on the hook.By the way, if you offer internet and are worried about having to do tech support and 2am, configuration issues, and liability, I wonder if these companies that offer "landlord internet" solutions are useful.