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I have the ASUS RT-AX86U (AX5700) Dual Band WiFi 6 Gaming Router and it can do all of those things. It’s also mesh compatible, so you can buy a second router and use it as a node if you end up with any dead spots behind brick walls.
How technology inclined are you? Build a PFsense/Opensense router from an old pc with two network adapters then get Unifi access points. They have been the best wifi experience in my whole life. This route is very technical but will give you the best coverage but will learn a lot. Also running cat6 drops or using power line adapters would be one of the best ways to get the connection around the house. But I have experienced with gfci breakers they can cause problems with them working.
With that kind of surface area to cover, and with how higher frequencies are not passing through these kinds of walls easily, you’ll have trouble finding a single router that covers it all.
You could try a router that can do a mesh network with a dedicated wireless backhaul to ensure good coverage, but if the walls are impeding the signal too much for the wireless backhaul to operate to a satisfactory speed then you may need to go with a wired backhaul, which is to run Ethernet wires from the main router to the mesh nodes.
OP will be “fried” before such a router AP will be able to cover such a vast area aith a usable signal.
Definitely a mesh network.
Google nest pro is actually damn cheap for wifi6e, around $350 for a 3 pack I Believe.
Edit - no VPN or custom support though, so not a good fit for you
Powerline adapters
This looks pretty cool. My house is old and ungrounded mostly. I wonder if that matters.
It does. I lived in a place with aluminum wiring. The pigtailing defeated the adapters. The place I’m in now is all copper, but the connection can be flakey.
My place has 7 or so circuit breakers from various additions over the years, and it looks like the adapters need to be on the same circuit, which makes sense, so I can’t really use them.
If you could get a decent spread of the house via 1 meter you would be fine. I live in 3rd Story of an appartment in Germany, my cellar is on same meter but different breaker and I get maybe half the speed, but is unbelievable that it goes that far and it works for Youtube etc. Maybe see if you could try some out, send back under 30 days if they don’t work?
When they do work they feel like magic.
I have 5800sqft and use 3 ASUS ZenWiFi AX6600s. I think you’d be good to do 2 unless you have a very odd layout. They are definitely on the more expensive side but they do very well.
alternatively the neighbor in ASUS’ product stack: the AX92U - also available in a pack of 2 (with a separate product name and page), for just a little more than the AX88U, so you can cover the area more efficiently with their easy to use meshing feature.