It is probably readily available on their web site.

For years, they’d used this site to stockpile soil from other projects, in lieu of moving it offsite (cost savings). 

Once you highlight a couple of locations, pay attention to active inventory in the areas by going to listing sites and checking out properties for sale.

I would sign up for BiggerPockets' STR-centered newsletter, BiggerStays, as well to stay up to date on all STR news and tips.

Do they know the economic pulse & news in their community that will affect their investors' deals? 

To keep up with updates, I follow different Twitter and Facebook posts such as local news reporters and the news channels themselves that update on council meetings and voting.

I also found this site listcolorado.com have you used this in your search?

Vacant lots can go for as little as $5000 - $7500 and are usually between other houses so you at least know utilities should be on or near your site. 

I’ve never rented one site unseen.

It’s listed for sale on all the home sites(Trulia, har, Zillow etc) If anyone has time to go take a look at it and based off what you see in the pictures and give me thoughts and what they think something like that could be built for.