Cloud Free Smart Home

So I'm looking to purchase a house soon, and before I paint I want to set up wiring in the house for a cloud-free smart home.

I currently rent an apartment. I have a home server running unraid with home assistant, and can run whatever server software I want to run. I'm looking at upgrading to a townhouse. Before I have someone come in and paint, I want to wire things for my ideal smart home.

My main focus will be networking and speakers.

I want to set up a server closet for my lab. I plan to get mikrotik switches. I currently plan on using tp-link omada APs for each floor.

I'm less confident in the speaker setup.

System Audio Inputs:

• TV in living room
• TV in bedroom
• Computer in office
• Computer in bedroom#2
• Any mobile device

audio out:

• Living room
• office
• bedroom (x2)
• kitchen
• primary bathroom

I'm imagining having a receiver for all the TV inputs/outputs and a central one for the bathroom, kitchen. I'm unsure about the office.

Cost is not a problem, I'm okay with 10-15k on the equipment for this.

What kind of amps/receivers would work best?