I have also found that the OKC rental market is robust and active. 

Metro Phoenix has a robust and competitive real estate market...most "deals" require value add eg - buy with cash/hard money for a discount, put more money into property, then sell for a profit or refinance and keep as a long term investment. 

What sells more; alcohol or bibles?

Get a taste for it, gain some experience, and then build a more robust plan later when you have a clue.4.

I started out using Buildium and it was great until I got to around 150 units and needed something more robust.

Also it can be the most robust depending on the accuracy/certainty of your projections.But, in reality, the comparable (sales) approach is also used (in conjunction with the income approach).

These 3 bed, 2 bath homes tend to be robust during recessions, but also attract quality tenants.How did you find this deal and how did you negotiate it?

If this property is purchased, there must be a robust plan to bring the property’s characteristics in range of the overall market (reposition/stabilize).

Wilmington/Philadelphia has a very robust healthcare market. 

I have had to paint my siding due to graffiti spray on it before and I routinely pick up baggies alcohol bottles and drug paraphernalia in the yard when I mow the grass .