Casa particulars are available, expect to pay between 15-20 USD per night. Meals are approx $5-10 USD more a night.
Be prepared for the onslaught of hoteliers and taxi drivers as you arrive at the bus stop. 15CUC was the going rate in August 2010 and there were a few owners desperate enough to offer rooms at 10CUC. Watch out for the people claiming to be hotel owners, offering you a very cheap rate because this may change when you arrive at the hotel, meet the real owner and get given the real room rates. The game is, that by this time you cannot be bothered to go and look for another hotel because it is just too hot.
