MikroTik - Chateau PRO ax

Yeah, it is but bang for buck Mikrotik can't be beat. From home gear to their cloud core gear, unbelievable value for money.

Go for chateau pro ax which is latest model and can handle your requirement very easily. Hap ax3 also is reasonable but since new model is available, you might consider pro ax for future proof your requirement. Regarding wifi speed, I saw your edit so it should be good

I did this with two Chateau Pro AX's, a CRS354-48P, and a CCR2004. The 2004 runs CAPsMAN to manage the wifi. It's complete overkill and I love it. Great reception throughout the house and basement, Wifi 6, lots of customizability: guest VLANs, multiple internet connections (fibre + bonded DSL), etc.. You can probably do this with a lot smaller devices. The CRS354-48P could be an 8-port, but for the wifi/routing hardware it's not a lot of money to jump to their fancy wifi routers. Plus you'll have extra ports on the Chateau's for switched traffic to your office devices. Only consideration here is it's not technically wifi roaming/mesh. I do separate named upstairs/basement SSIDs for fixed devices (cameras, light switches, etc) plus a common virtual one overtop for devices that move around. If I go into the basement I'll eventually be kicked to the basement Chateau, but the transition is near instant. Since moving to this I've had zero outages, barring Google's cloud issue last week.