While someone buying it with a tenant is typically looking solely at the ROI numbers.Also, find an agent experienced in selling occupied rentals!

Properties typically on a land lease in communities like this are more difficult to get financing on - so not only check the values but also time it takes for these properties to sell to understand your holding costs

Typically, if they can make it work as an STR they go that route because it almost always generates the most revenue.

Since tax bills are for entire parcels (typically, though not always) then it is highly unlikely that they somehow segregated the taxes for that small portion and paid it.

That's typically where I see people referring to entry fees.

They usually sell for a really attractive price because investment property financing is (obviously) difficult, somewhat limiting the buyer pool to owner-operator small business owners (who in turn are typically great clients, as well).  

Rick Basement square footage and room count are typically not counted on public record but in some states agents list it or are allowed to list it. 

We arrive in Portugal at the end of March and once we have got ourselves sorted I will see if we can get a few people around for a meet up. 

Typically, 8- 12% net for OOS investors based on cash purchases.Good luck 

I’m not sure what sort of extensive “due diligence” you did but clearly you didn’t.