I had a leaky hot water copper pipe on my third floor master bathroom causing water damage to my second floor hall's ceiling

Plumber removed/replace 1' x 1' tile and replaced around 10' of copper pipe with high temp PPR/PB pipe

Plus he did tons of jobs around the house
-installed bypass valve and additional stopcock to each of my bathrooms near my tank area
-replaced kitchen and bathroom taps
-replaced several flush valve and inlet valve for toilet
-new pipe (around 3') from my outdoor water filter to my car washing area

Total cost around 1400 (which at the time I think it was on a highside). Compared to your quotation now I think I got a bargain

Caveat - im on landed dwelling so my non-load bearing walls are made of redbricks and mortar. Since your mentioned concreate, Im guessing you are on prefab condo/house
Very rare for builders to run piping on concreate except for prefabs