I have a 5000 sq foot home and my daughters bedroom is upstairs the furthest away from the office where we have our wifi set up. I went with the Eero system recommended by Apple and added extra mesh extenders to service all our areas upstairs and our outdoor areas. I do love the set up and the App feature, it lets me know when someone tries to access or log on to my system. So I know if I am not home and my kids have friends over ...lol
With a house that size, you will probably need at least 2 repeaters. One on the main floor and one in the basement.
I would go to Best Buy and ask them. They d have some very good modems that should meet your needs.
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