The reason being that the maintenance tenant could "hire" other tenants to put holes in the walls so that he could fix them.

has some pretty smart and  interesting perspectives but his "Your home is not an asset because it doesn't generate income" is just off the wall. 

It has an addition of a 2 br 1 ba that shares of a roof but does not share a wall (we will call it unit b).

Stay away from large scale water intrusion issues (roof, siding, or otherwise), major foundation issues, issues with framing, stupid layouts that require rearranging walls, or places that have issues that can't be fixed (location, occupancy/zoning issues that impede your desired use, etc.)

There's old cat feces everywhere, noticeable urine stains, scratched up walls, black mold on the walls, rotten window sills, doors made out of wood and chicken wire that apparently were built to block off hallways, a tree partially through the roof in the living room, holes in the walls in some places, refrigerators that are beyond disgusting and vanities that are barely standing among other issues.The place has a lot of potential I think once it's cleaned up but I've never tackled this kind of situation before.

Since the cabinets are going to be in the kitchen and are going to take more use and abuse than normal walls do you go with a different type of paint for those?

This is really easy to do if you have plastic drain piping from the sink to the trap adapter in the wall. 

When you go to dry wall I would 100% pay the extra money for your favorite "concrete" board. 

We were constantly repairing furniture, broken chairs, touching up walls, unplugging potties, etc. 

We got the spots treated for $750 (seller paid for it), so i thought everything was good.2 months into the rehab I found severe termite damage while tearing out drywall in the spot i had sent my realtor a picture of and it the downstairs bathroom on a load bearing wall which will probably end up costing me thousands.I should've done better due diligence, however, I am not an inspector and thought I was covering myself by getting it inspected/treated prior to buying.