Hello, I am looking for advice on Mesh Wifi, or other options if available

Current setup:
1100 sq ft condo unit
LAN ports exists in both home offices which are connected to the main modem in living room (blue X)
Maxis 300MBps with their own ONU modem and router and additional one router (Maxpert) in home office (blue X)
current issue: Bedroom and kitchen has dead wifi zones





modem:



Main router:



Child router via maxpert



Planned setup:
Ditch the additional maxis router Maxpert
purchase setup mesh wifis.
Blue X refers to modem, red X are the mesh nodes. Main node will be the Red X in home office 1





Requirements:
1. fix current dead zones in bedroom and kitchen yard area (for washing machine and dryer)
2. Door area needs the wifi too for door smart locks/door bell

Experience:
I have experience with Deco E4 in previous house, the cheapest mesh in market but I had awful exp (disconnection, speed reduced by a lot).
I am willing to spend RM500-1k for the new mesh setup.
Or if you have alternatives feel free to suggest, thanks!