Cheapest places to buy property and live in on a day to day basis?

I'm looking for peoples knowledge on what they think are the 3 cheapest places to buy property in Poland. Also in terms of day to day living costs how do each of these places compare with each other (very roughly)

The eastern parts of Poland seem to be the cheapest. But they are also least developed and with the highest unemployment rate. The cost of living is about the same in all parts of Poland - regardless the location. Of course, if you live in a country, you don't spend so much money on food compared to living in a city.