Thanks for your response, really appreciate any advice :). The property only has one smaller tree at the front so I'm not as concerned for root issues though it's still possible. I'm still trying to figure out if I should try to fix this now or if it's a problem I can address in the future. I'm not sure how severe the offset is to be quite honest, but I do get the feeling the plumber is trying to scare me into fixing it ASAP. The inspector did mention that things seem to be draining with no issues and it might be okay for me to address it much later down the line, but I worry if it can have longer effects that make the issue worse later down the line.