My theory is whatever my business model is and whatever policy I have written down is what I go by and implement, I am not allowed to use my judgement to only my companies policies and practices

Jay,Didn't anyone tell you - Never buy a rooming house on Elm Street ;-)I do like the airline personnel model, but find student rooming house and those close to research/teaching hospitals are good bets as well.  

The business model of a Realtor is to help you until you find your property with the hopes that that pays off in the end.  

But most do have their own washer/dryer.That tells me that everyone in my area is following the same model too. 

I've got one property that is a buy and hold and I'm looking into trying the buy-rehab-rent-refinance model next.

What i mean here is to know the essentials such as  where the water shutoff is, where the electric shut off is, where water pumps are and what kind of mechanics you have inside the building.Take note of the model numbers, year of manufacturer of certain vital equipment such as HVAC, water heaters and so on.

'we're on vacation' parties.So it's just different business models.

Nicer, cleaner, newer homes tend to make less cash flow, but you attract better tenants and when you take pride in your property the tenant is much more likely to take care of the home, and you have less turnover because your whole business model is around benefiting the tenant and they sense this and enjoy the mutually beneficial  relationship.  

Add in drugs and alcohol and even my model will see problems now and then.  

(property taxation as a field of study)Good luck with your continued research and delivery of the finished product for grading.