Accommodation in DRC is expensive by and large, and both choice and quality are lacking in most places. Real budget accommodation is hard to come by, and where it does exist it's often unpleasant and unsafe. At the US$20 to US$40 level you might get a fan or TV, but running water is still unlikely. Moving into the US$50 to US$100 range and rooms will be much more comfortable. You'll need to spend a minimum of US$100 a night in Kinshasa for a decent midrange hotel.