I have a UNS 60u that is shrimp only, we do weekly WCs along with the other tanks but that is because we have a system to do all the tanks at once. I think that a shrimp and snail tank is really easy to maintain particularly if you don't have any stem plants. Moss, carpet, crypts, Java Fern, etc., all work really well in a low-maintenance tank.
FWIW - we do about a 30% WC on the shrimp tank.