Edit: Wikipedia says:
> Kamprad owned a villa in Switzerland, a large country estate in Sweden and a vineyard in Provence, France.
I can't guarantee the prices, but those things should be in the multi-million Euro range. Not quite rapper expenses, but definitely not middle class either.
I mean it's really nice house and apparently comes with a very big garden and beautiful view of the lake, but it's hardly opulent. In a different, cheaper, part of the world a house like that would definitely be within the reach of at least someone earning a decent upper middle class salary.
edit: Here is his "large country estate" in Sweden: https://x.cdn-expressen.se/images/ae/fc/aefca41095674fdcaf01...
Key words :)
Real estate is 90% "location, location, location".
And even with it's perfect location it's apparently still 'only' a ~4 million eur. house. It's not even one of the 10 most expensive houses in town. Hell there are 10 more expensive houses for sale around there on homegate.ch right now.