Hi I'm new here and don't have a pool yet. We are thinking about getting an above ground oval 18x33 pool but want to bury it 27-30 inches to be level with an existing deck. The installation company I've talked to is very hesitant about doing this and says it's inevitable that the wall will cave in during a liner change. Is this true? Anyone have a similar pool and have had issue or no issues? The pool we are looking at is warrantied to be buried 27 inches.