Food and drink is very cheap. About 20 leva each for a very big evening meal, just under ten quid. Large beers about 3 leva. You want to get on the 'rakija' though, cheap and will get you pissed quick, most bars should have a bottle of homemade stuff stashed away.
The price of ski passes have gone up in recent years, I think it's about 55 leva a day now. I have literally never been to another ski resort so I have no idea how that compares!