Rents and returns look decent, but is this a war zone?

And they miss a deal because they think the house is falling apart or way out of their comfort zone (just like what happens with new buyers who don't have a decent agent to walk them through the inspection report!). 

We have a duplex Zone R-4.

DO NOT rent to the person that wants the reduced rent AND start date 6 weeks away.... those are all red flags for a PITA tenant that will feel like they broke you already....... not a good start.

Additionally, you have VERY bad zoning laws that keep new housing capped.

During a walk through I'm looking for any red flags, unreported maintenance, cleanliness, and the general condition of the property. 

I am scouting some land to build a new multifamily structure on for an investor friend of mine and I'm a little confused by the zoning descriptions I am seeing on Loopnet and Crexi.

@Stephen Wilson - In Richmond or Hampton Roads you can invest the funds in an Opportunity Zone instead of doing a 1031, which is way more advantageous.  

If there are any red flags, try to talk to a previous Landlord that is well removed from the situation. 

Just some ideas.Also, have you checked the zoning for the lot you own to make sure you can put a mobile home there?