The only problem that I can see with renting them out is to find reliable people to maintain it, i.e. cleaning it between guests along with upkeep of the place. My brother pulled out of buying a place there to rent it out for this reason. If you can find someone then great; sit on it for a couple of years and then sell. Zakopane is becoming more and more popular each year with foreign people, so much so that we don’t go skiing there anymore and go to Slovakia.