For right or wrong many sellers do not like FHA. 3) Larger loan limits as shown below.With most lenders 75% of rents will be counted as income for helping increase your purchasing power like always. 

Yeah, the bill I get is for electricity and water for the building the washers and dryers are located in. 

if you are basically buying 100 refrigerators you have negotiating power .  

Financially, I am fairly stable with strong credit (730+), and working a entry level tech recruiting job allowing me to save roughly a quarter of my salary after bills, entertainment, and etc.

We found a serious mice infestation in one of the apartments and are considering notifying the tenant (written) on our findings, order the pest control service and have it billed to the tenant but was wondering if anyone has done this differently with results.  

This is causing more wear and tear on what the house is made for, and the water bill im sure is going to be through the roof.

I promise, he will have more negotiating power than you and since it's his mess he should deal with it.

@Bill Brown Hey Bill that's a great question my friend.

Then changed title to himself using Power of Attorney for the other person.   

For what it's worth, the tenants do pay a fixed utilities charge of $125 charge combined per month, which is included in the rent number I gave you (I checked with the city prior to buying, who told me the previous 12 months bills had never exceeded $135).