If you replace half of the plumbing system, you will still have issues from the other half.

Diversity is a fundamental component.  

It is currently vacant and we are looking for a Full Replacement Value policy in order to comply with terms from our lender.

Otherwise component costs must still be estimated.

Once completed, all wiring and components will be fully secured and concealed in accordance with code and standard installation practices.Given the concerns being raised, I would also appreciate guidance on how future maintenance or replacement of my siding would be handled should access to this area become necessary.Additionally, the neighboring property regularly uses the shared walkway to drain water, which often results in dirt and debris being washed into my front yard.I have attempted to coordinate with the building inspector regarding this matter; however, they have been unavailable to date and have indicated they plan to visit on Monday.

What was replaced, who installed it, what warranty applies, and whether that warranty is actually usable when something fails again.Early on, warranties were effectively useless because:Paperwork lived in emails or invoices that no one could findVendors changed, disappeared, or denied responsibilityPMs or VAs didn’t know what had been installed three years agoNow, everything is standardized:Approved materials list by asset classPreferred vendors tied to specific scopesWarranty info logged at install, not at failurePhotos, serial numbers, and install dates stored centrallyThe key insight is this: warranties only matter if your system can surface them at the moment of failure.

A comp on the other side of town is 305k.

Yes,  they measured all components of properties and split them into different depreciation categories.  

Every light fixture replaced now is with LED.

If both components are at the end of their useful life, both need to be replaced.