Clay sewer and galvanized water lines

we are currently looking at a park with clay sewer pipe, and galvanized water lines. i have heard a lot of horror stories about clay sewer pipe, but the current management says they have never had any problems with it. as far as the galvanized water line, i know we would price in replacement of all of it complete with curb stops at every home, so i am not as worried about it. Has anyone had any good or bad experiences with either of them, and would it be something that any of you would consider a deal breaker not to buy the park. it is a fairly large park with a lot of vacancy.