No comparison. Croatia is at peace and as with many other countries in that area, food is cheap and accommodation too. Romania, Bulgaria etc...If you decide to book a holiday in any of those East European (and just beyond) countries..I would suggest you book flights and try to arrange your own accommodation over the net or when you get there...Package holiday operators are charging much the same prices as for similar resorts/countries, where the standard of living is much more expensive...so are making huge profits. About the flights (from UK anyway) try " wizzair.com " which can take you to Budapest (Hungary) and from there you can make your own way by bus or whatever.
Incidentally...A two bedroomed house in Romania with land...will cost around 25-30,000 euros or £18/23,000.... A house in the Capital Bucharest will cost around a tenth of one in London. Soon to join the EU, the prices will surely rise as people move there to start businesses. The country will develop from what it is now and so will the prices   ...Good investment?
Best wishes, Mike