Hi Kai,
I can't tell about the other European countries, but as far as Bulgaria is concerned it is very easy to become a citizen of our small, but hospitable country.
Bulgaria has joined European Union this year and it experiences a fast process of improvement and developing.
From the time of joining the EU buying property and land became very easy and many foreigners retire here or buy as an investment.
If You ever consider moving here, make a visit or just want to know more about Bulgaria, i'll be glad if i can help.
Kalina Genova
kalina@propertyshop.bg
propertyshop.bg
skype: propertyshop-11
mobile: +359 878 445 089