Seeking Help/Advice for a Potential Land and PreFab Home Purchase

This is my first time posting to this website, though I've enjoyed its content for a while. 

I'm considering buying a plot of land in Montana/Wyoming/Idaho and placing a nice prefab home on it. Does anyone have experience in this field? I'm not exactly sure where to start, which questions to ask, etc. I also want to know if it's cheaper/easier to just buy a property with a small home, demolish the home, and build a house from there. This may avoid zoning/electricity/utilities/etc. issues. The goal would be to put an AirBnB on it (i.e. short-term/vacation rental). I'm looking for any advice/materials you guys may have on this.

Thanks!