They let my on-site manager know they were going to "take a trip for a birthday party" and have not returned. 

Go to Etsy and search for "rental property tracker," and you will find hundreds of nice spreadsheets to track 10-20 rentals, usually for under $10.Software has extremely helpful features like online payments, marketing syndication (click a button, and your property is advertised on multiple sites), electronic document review/signing, maintenance tracking, and owner reports.

You would also need to be at the project site every day watching the work and managing the contractors.

Federa | Buy, Sell, & Rent Homes is the best site for real estate for my opinion.I found a lot of services there that I couldn't find anywhere else.

There's some pressure from tenants, but you're right on site to handle things quickly.The real investor-agent.

In particular I am seeking help for the following;1) "Provide an evacuation plan (shall include Site address, floor plan//site map, escape route(s), meeting placeoutside the home, emergency number 9-1-1).

I think there may be a market for a lower density campground that offers a higher level of privacy per site with amenities (electric/water hookups, RV dump site, bathhouses, etc...) but...

I'm out on site regularly for that project for my W2 job, there are rumors of it growing in scope too.

It doesn't make a difference whether you're on-site or living elsewhere.

Have you spoken to any site contractors in the area or even outside of the area?