Does anyone have any insight into this niche?

There are a few things you should consider after you select your niche and market area but before you start investing.  

You should figure out what your Niche and Strategy would be first.The Best Beginner’s Real Estate Investing Course OnlineModule 3 explains Niches and Strategies.I will be Flipping Single Family Houses (to make Cash) and reinvesting that cash in additional flips and also Buy and Hold Single Family Houses and Small Multi Families up to 4-plex for long term.I have not narrowed down my Area (Zip Code) yet.You could also House Hack your first Property while LearningHere is another post similar to yours:https://www.biggerpockets.com/forums/12/topics/413684-i-pondering-what-to-do-next-want-to-make-a-good-investmenthttps://www.biggerpockets.com/forums/12/topics/413149-what-direction-should-this-newcomer-go

You said that a big part of getting into this niche market is networking.

Tons of advantages for these foreign companies, including local government's incentives.Brazil's recession plus Paraguayan Government's aim to turn the country into South America's China seems to be opening a niche for industrial development. 

The most accurate way to do it will be you, create an excel of a variety of different properties, from 2beds to 4beds etc etc, list pricing and location of these places, and any unique amenities then throughout the year go through their calendars and mark down their booked days.You may be correct on the HIGH amount of unbooked days, if the place you're looking at is primarily just a summer retreat then it may be too early to tell what their occupancy is.

It depends on your niche, your market, and what you are looking for.

There are a few things you ought to do after you select your niche and your market area.  

It's invaluable for helping you decide which Niche and Technique you'll use in your investing.

My ask is for some advice for Rural area investing if anyone has experiance in this certain niche.