Hungary is great mate. I went for a couple of days and stayed two and a half years, then came back and after a few years, ended up back there for another two years.
Flat as feck, lots of game, no poaching laws, farmers happy to see you, great food (if you like meat), great beer and spirits, nice people, beautiful women, good night life etc.
Poland is up near the top of our list at the moment, like you said, should be a few free properties!