The hired leak detection company states there is no leak, the roof has been replaced as a result, and the crawl space has also been encapsulated.

I do Zillow rental manager (which posts to a handful of sites) and FB marketplace.  

The best way to see if there is demand is to look on Zillow (there is a room feature) and Facebook Marketplace.

The best way is doing through an agent but if you really prefer not to use an agent, I would recommend posting on Zillow and FB marketplace (I have had good luck with both). 

My GC primed and painted over them a few times thinking they were just old, stubborn stains that needed extra product, but they kept coming back after each rainfall.I hired a water intrusion detection company to help me pinpoint the problem - they said the new roof seemed solid and that based on infrared and temperature readings, the moisture is coming in from the partition walls.

In my view, the rules keep you from investing a sizable portion of your net worth on a lightly regulated investment marketplace.  

I only list on Facebook marketplace, but this is 100% market specific.

However when it comes to the market place the tech is lacking.

Learn why they are flocking to single-family rentals.This article was a year ago: Rhino is revolutionizing the single-family home marketplace for renters.

(Zillow, Apartments.com, Facebook marketplace).