Any advise on other aspects I should look at before making a decision?

Nathan,     To your first point, I have two years of rent equivalency saved in reserves for this property; we replaced the roof two years ago, all appliances except the fridge are new or refurbished, the water heater has been replaced and the fence/gates mended from a tornado.

I am a Union Carpenter/Contractor, and I can't count the number of ramps, decks, doors, egress windows, and roofs we have done for our disabled military.

Many people get into the different investment aspects of real estate without learning the ropes and they may do unethical things. 

Big ticket maintenance item repairs are not expected for years - most are within 7y (roof/hvac) or newer (floors, windows, water heater).  

The roof is very old. 

Here are a few requirements to be eligible.The build date of the property is between August 5, 2005 and December 31, 2021.The property is between one and three stories.The builders incorporated features that are energy-efficient such as high R value roofing, insulation, HVAC systems, windows and doors.What are some examples of specific requirements for this tax credit?

New DIY roof.

Should It be sold to gain multiple more rental properties in nicer areas better in every aspect?

I’ve been told by other investors that the “like-kind” aspect of 1031 is intentionally grey so you can likely fold into a quad without breaking any rules, but this is a conversation for your real estate attorney.