The way I found my entrance into the game was through being an agent.

I'm still not quite sure what all your after here, but if you're considering house hacking where you live in one side and make the other an Airbnb...preferably with two entrances.

The sheriff will post a notice of their own on the entrances to the premises, then will enter the unit to make sure it is clear or to confront the tenant, and then once the tenant is out, they will stand by as you change the locks and empty out the dwelling.This is not legal advice.

Entrance cap rate does not have much use becasue your exit is priced based on future NOI and future cap rate.As for CoC, it depends on your leverage but 8-9% starting in second year would be good.

The stairs in question are in an enclosed private entrance. 

So, I kept running my hill loop, but failed to execute my offer.Some time later, I saw work on the main house and two new estate-type homes being built behind a fancy gated entrance road.

Yup, @Jerry W. pretty much said what needs to be done.Before I rent properties out, I seal the properties (make sure there are no entrance holes into the properties).

I am a fan of the way he thinks. he will take an idea and follow the idea path in his head, letting it lead him wherever the idea goes.. its refreshing, similar to the way I like to think. we came up with an interesting foot printthe jut outs are the entrances and the pen lines around the building would be hedges for privacy.  

I helped my friend move into an apartment yesterday and noticed that the landlord had placed painters tape on the edges of all the entrance doors as well as cardboard to save the floors.

Since it is literally divided like a up/down duplex with its separate entrance, I've rented out the top unit (3/2 unit) to a family for $1,875/month.