You have to have an inspection at least once a year,, gates, fences, equipment. 

@christopher phillips My realtor sold an identical house on next street over 8 weeks ago for 131,000 but it needed updates a roof and Windows.  

Here, maybe this will be interesting/helpful to you - I am currently working on doing this right now with my own property, which happens to have a nearly identical loan amount as yours, and there is $50,000 in equity I could refi out.

At $22000 annual rent and 55% expenses that gives an NOI of $9,900... nearly identical to Todd's.

Her equipment is more up to date than other companies in the area also.

There are a lot of facets of protecting property from a number of problems and maintaining the equipment that makes it work.There are lots of 'how to' videos on you-tube and when you have a problem with a particular system, experts in that system can help troubleshoot and solve the problem.  

One of the units' rents had just been raised to $1100/month, and all units were identical. 

Call around to replace your PM, that person shouldn't be telling you that you have to provide light-bulb changing service or install equipment like a garage door opener where there wasn't one before.

Tonight, two popped up at about the same time and when I open the listings they are almost identical buildings, owned by the same person, and are each going for $165K.I'm considering making an offer on both duplexes and I was wondering if its an acceptable practice to ask the owner to consider giving me a discount for buying multiple properties from  him.

If it was a major spill over a long period of time, you are looking at serious costs $25,000 to $30,000.Essentially, it's heavy equipment to remove the contaminated soil, treatment of the area, testing.