Well, its survivable. I drove twice via "non-central" Hungary this year. And people understand basic English. However, can't comment on availability of English-speaking communities of smart individuals in Hungary.
As an IT professional living in Hungary atm, take my advice and don't come here. I've been living in Stockholm, Madrid and Wien for a while, so I have comparison. The intellectual community is evaporating, and although the city is nice, that shine will only last for a couple of a weeks. If I had a remote job, I'd go back to Madrid, loved it there :)