My best understanding from talking to reps is they have one local employee (in addition to vendors like cleaners, landscapers...) per 10 listings/properties. 

Electric: is the easiest to split, but may require holes cut in walls to separate the units.Gas: gas lines aren't as flexible as wires, but it can usually be done affordably.Water: most cities will NOT install additional water meters on a property.

In both you are now paying taxes on an additional $1K/mo.

Regarding insurance adding additional umbrella insurance is great idea. 

If you do call them best case scenario you get the listing, sell their home and end up with some additional buyer clients that did not end up buying this particular house.

Additionally, take some time to drive around your neighborhood and gather information on recently sold properties within a mile radius.

Even with that additional cost accounted for it looks like the guy made out like a bandit.

Additionally, it's a good idea to connect with a Property Manager early on.

Typically you will close sooner than 30 days, but this way if there are any issues or anything that slows down the closing, you have some additional time to close still.

@Ryan VienneauAre they able to set-up your credit cards as additional "accounts payable"?