Forgot all mesh. Setup proper lan wiring with poe switch. Go for enterprise device. 3k really a bit a low side. Single AP almost 1k or more. POE switch also around 1k, a router also 1k+.

Also never see every single pc required own vlan. Need to setup whole network stuff for every single vlan (for ip/routing setup). Also ipv6 will be a headache.

Beside TPlink omoda do see whether ubiquiti brand interest you.