I heard that it can cost up to 4 quid on the piste for a bottle of water, now that could be an exageration from the shop assistant trying to get me to buy that water bladder thing, but it may be true!
Seem to recall a bottle of water being about 20p on the slopes. Tell the shop keeper that you'll eat snow rather than buy the bladder thing - she's taking the Michael (or has confused Bulgaria with Austria!).
I'd have to agree, we went for 4 days, spent a total of £350, that was for 2 people and included all our food, drinks, ski hire/lift passes, duty free. We were eatin out for 20 lev per couple each night (about £7, including beer & bottles of wine).