My partner and I decided we could pay a specialty cleaning company to clean out the mess and odors, then turn around and resell it on the market to other investors as a gut rehab or tear down.

That is a highly specialized trade and should be mitigated correctly to avoid mold growth, odor or structural issues.

Decline to rent to anyone who emits the odor of an alcoholic beverage during the interview.5.

Now cats are a hard no to me due to the odors they cause. 

Specifically damages to the flooring stating that they would be responsible for the costs of replacing carpet and any treatments necessary to remove odors should the pet urinate/damage the flooring? 

We started with a vinegar/water (50/50) wash, then TSP, then a stain & odor blocking primer (Kilz or Zinsser).

Being dirty is a huge issue because it is disturbing the other tenants due to the odors.

Quote from @Shana Kellman: It is a wide range and nobody can answer this for you.I recommend a higher cleaning fee because you should have carpets cleaned to remove dander, odor, and hair.

You can affirm that allowing the animal does not mean other rules already in place for the property can also be ignored, such as excessive noise, offensive odors, aggressive behavior by the animal, cleaning up after the animal in common areas, etc.

Other issues such as neglect, unauthorized pets or pet damage/odors, etc.