How much would I expect to pay to have a drain unblocked?
The best thing for you to do is get a couple of estimates from local people. There are too many variable that can drastically change the price And if as you say all theses drain into the same line it could be just that it is undersized and not a blockage at all (the smell makes me think blockage). If your sewer main needs to be “rotorouted” out it could be a lot more than a simple blocked trap.
