Amelie benefits from its superb location right by Pushkinskaya pl – it's unlikely you will find a room much cheaper than this in the vicinity, and it's a very nicely furnished room, too! On the downside, the hotel is a converted apartment, which means shared bathrooms and an unmarked entrance located on per Kozitsky.
Once you find this lane, look out for the entrance in the building marked as per Kozitsky 3. Dial 17 and they will let you in.