Trying to set up a 75,000 sq ft facility hardware stack after the network admin quit; looking for feedback.

I'm not setting up any of the addressing but the following hardware is what we are considering:

Wireless as primary, wired as a fallback.

Be as critical as possible, I am not a network admin.

• Redundant fiber into the "server" room
• Two Cisco Meraki MX100 connected by VRRP
• Both MX100's feed into a Cisco Cat 9300 24 port
• Cat 9300 feeds two Cisco 3504 Wireless controllers (redundancy)
• Run redundant lines to each floor core using ceiling rails
• Cisco 9300 Network Modules at each core (total of 8)
• Cisco Aironet 4000 access points for a mesh network
• Cisco VOIP phones (no model picked yet) with pass-through

Thanks!

Edit: 25,000 Sq ft