Plenty of workers will be doing extra 'on-the-side', so to speak. There's a lot of nice new houses going up in even allegedly "poor" areas - where's the money coming from?
Thats true, but the majority of Poles haven't the skills to do that, a lot of money coming from the US has dried up, zakopane when times were good was built on the funds of poles working in the US. Things have changed. Mr D keep in mind that we are not talking about homes worth 1 to 2 m, but 3.5 million zlote.. Some Poles are very rich, most are struggling working long hours with increasing costs associated with living. I generally believe that real estate will be stable for a long time, although some properties will fall dramatically, by the way, how long does it take to sell a house in Poland, hmm I've seen home/apartments still not sold after 2 years.
There are plenty of reasons as to why it wont, a major one being a nice flat in the city will cost 6000 PLN / m2 bit if you drive a few miles outisde you'll get a house for 1500 PLN/m2
Depends if people have money, your theory does't hold in the US situation