i'm trying to build a cabinet for my new house, but the current plumbing is located near to the middle of the wall where the cabinet will be install, the wall you see in the picture is load bearing wall, after consult with the in-house contractor, they said the pipe is located deep inside the load bearing wall and it is difficult and risky to relocate the piping

so what i'm trying to do now is to minimize the wet work needed as it is very costly, and if there is leaking i will need to remove the entire cabinet and hack the wall for repair

my current piping is as per below, there the red square is there i wanted the sink to be, the countertop will be 900mm height (3 tiles height in the pic below), if i want to keep the drain pipe and P trap at it's position, can i just use PVC pipe to connect to the sink drain and do a slight slope towards the P trap?

and 2nd major problem is the water supply pipe, it is too high at 940mm, and too far off at the middle, i intend to make a countertop faucet instead of wall mounted faucet, the current solution i can think of is to build a 100mm false wall behind the lower cabinet so i can connect the water hose to the bottom of my sink, or is there any better solution?



and this is the design i'm trying to build




i know it will be better to just engage with a contractor, but i hope i can get a DIY-friendly answer here instead

already ordered the countertop, so i cant change the position unless i dispose of the countertop

actually i wanted to place it in corner so that i have more area for preparing food, the kitchen length is only around 2.5m