More traps, patch up holes, tell your tenants to be extra clean when dealing with food. 

Any taxes not owed, a seller merely file a tax return with the state, just like any other tax returns filed for extra taxes a government has with held. 

The reality is the opposite - if it's not in writing then the PMC doesn't have to provide the service or can charge extra for it!

If before getting a permit you have to dance around for Code Dept officials/ city gov and crime is thru the roof, investments will definitely be low whether real estate or other, but it should be benefiting the city officials to keep things that way.

Any ideas on what I could turn it into to help generate some extra profit?

The pet fee or deposit for the move in of 2 cats (you did charge one, I hope) should have just about covered the extra anyway.

It may sound nice to pay a 6% management fee but the extra fees can add up to be more than the other company that charges 10% with no additional fees.

I used all the rent and any extra money towards paying them down.

The reality is the opposite - if it's not in writing then the PMC doesn't have to provide the service or can charge extra for it!

Also, keep in mind that an IN multi member LLC would require a separate tax return, so you would want to budget for extra admin fees.