My friend has a huge 4,000 sq foot brand new house in the South for 1/3 the average price in London. You cannot find that type of house even in the richest areas in Europe.
As a European who also lives in a 4000 sqft brand new house in the south of the US, I wouldn’t wish that on anyone though. I’d happily take a 2000sqft house that was built at least to the standard of the second of the three little pigs, something which seems to elude construction crews south of the Mason-Dixon Line.
Regardless though, the size of your house says very little about the quality of your life.
[1]: https://www.winkworth.co.uk/properties/sales/lansdown-road-b...
But North America is fricking huge, and if you are willing to move out of the city it's hard to not grant you that at least: you have a loot of room.