Just watched Bigger Pockets podcast/video about picking a market here as well as read through this article about markets with both appreciation and cash flow here.First lesson - keep the end in mind.

Well I have a deal under contract and I have a cash buyer.

If you can find anything comparable that has sold in the area as well as if there's anything similar on the market, that may be a good start. 

If the sales price is $850k you will need significant down payment to carry the DSCR loan on $5300 current rents...check in with @Joseph Chiofalo  as DSCR loans 5+ units are typically a bit more difficult to place as well. 

Typically houses/properties that have well water and a septic system have them in opposing yards, and code typically demands a certain distance between them. 

Prior to this, I had 2 years of good tax returns from 1 stable job as well as my side business. 

It is in a great area and cash flows well, for now. 

I want to help with low-income housing in my community that I know well and I've worked in for many years. lenders sometimes want 3 deals of the same level done.

WE NEVER in 10 years buy in SH, pricing to high as well as taxes.

@Bob Asad, Bill outlines it pretty well.