Start with the Arizona Department of Real Estate website and verify credentials, search licensees by entering their names. 

Dennis' dad and I actually tripped over something similar back in Chandler.. we learned to tap into city planning websites and even call the permit offices directly to get a real sense of their backlogs.

I got a hold of the owner by looking up his information on the county website.

She was very pleasant and explained that their website doesn’t work, which we thought was a bit unusual.

Lancaster city limits short term rentals to only certain zones of the city so definitely look at the city website for that information.

I was just on their website looking at the permit process:CityofSac-STR PermitLooks like 90 days max until you get a conditional use permit but still reading as it seems a little unclear:A short-term vacation rental may operate from a location that is not the operator's primary residence for a total of 90 days in a calendar year.

Does anyone recommend knowledge sources on building a mobile home parks (websites, books, organizations, plans, etc..). 

There's a lot of info here on BP and I'm just trying to take it one step at a time in the "Get started" section of the website.

You'll likely want someone that can handle A to Z with marketing, pricing, cleaning, maintanence, decor, websites, reviews etc.

As you begin your REI journey here is one tip I have for you:Use this website as you are trying to narrow down the places you want to invest in. https://www.areavibes.com/Its awesome because it gives you a "total livability score" & you can compare different zip codes & streets to others.