If not to you is the buyer making demand on it and you won't agree to its release? 

In your experiences, what industries have you found to be the most consistent for multifamily housing demand, across multiple market cycles? 

For example, this article mentions that such factors as demand, rental rate, and HPI are the main factors for RE investors.

More customers means more demand and opportunity for lower vacancy and higher rates.So even if XYZ short term rental company offers a great deal to hosts, they need guests or the platform is useless.

Then rule out small animal activity making the noises, like raccoons.If you're actually worried about the ghost thing, go with Jesus first.

The length of time to find a tenant is based on your location and demand.  

Doesn’t mean it’s a bad deal or idea, but development is a whole different animal with a lot of moving parts so you don’t want your first deal to be your last

Location is critical.Even if the supply is greater than the demand, the good ones are full and the others are not.Some of the keys to success;1- Location, location, location.

Retail real estate demand is still here (in Florida anyway and a lot of other agents I have spoken to across many major markets - except NYC). 

I think demand for those will rise - but on the other hand that market tends to be the hardest hit right now with vast parts of the economy that tends to employ these people have been shut off.I have a flip I am working hard to get complete and on the market quickly with hopes it can sell at current value.