For UK citizens in Hungary, if the UK votes to exit the EU what are your contingency plans?
If the UK exists the EU, then you are no longer EU citizens. You may not be entitled to EU residency rights in Hungary. And this may including such things as property rights, living in Hungary, and other issues. (We have no idea how the HU government might "respond" to a Britexit; maybe badly.....).
This is, this is a "what if", worst case, scenario question. So please no comments about "it won't happen", or "things will work out with bilateral agreements".