It's not difficult to find accomodation in Ukraine, especially in big cities. The best way to do it is the Internet, in newspapers or through real estate agency. The price will depend on the conditions, length of stay and the city. In the capital, Kiev, it is rather expensive, in smaller cities ofcourse you can find it cheaper. For example, if you came to Ukraine to study, the price for renting a room will vary from 50 to 200 $ (not in the capital). if you rent an appartment with somebody else, it will be cheaper. Buying a flat though may turn out to be very expensive !
Accommodation in Ukraine