if there would a be a large return on investment in the mid-long term.
There are other members much more knowledgeable than I am about this but I'd say you wouldn't get a 'large' return in the mid-term, not in Poland anyway. Don't know about other central European countries. The best reason to buy a house is because you want to live in it. If you buy it as an investment at those prices, then you need to be prepared for the ups and downs of the property market and maybe be looking at passing it on to your kids or whatever but not expecting to get a big return from it in your own lifetime. That's just my view. I'm sure others will think differently.