1. Rich-ass people in the United States buying an extravagant vacation house overseas
2. People overseas moving to another non-American location
I don't give a shit about rich assholes who have so much money to piss away that they have decided to buy a house that they will live in maybe one month a year. A lot of these people buy houses in South America because it's a little cheaper. Just where I want to move, a land where the chief economic intake comes from drug lords and hiding Nazi criminals.
The other possible plot of the show usually take place when a dirty European person has decided to move from on former Communist dirt hole to another. What do I care about the Eastern European real estate market. I don't even know the exchange rate, these prices mean nothing to me! The houses make no sense either. No closets, laundry in the kitchen/bathrooms, and some bizarre electrical system; just what I want to watch on television. The dirty real estate agents are near impossible to understand, and seem to care less whether their clients are happy or not.
I would rather watch a Rumba floor cleaner bounce around the room than watch House Hunters International.