Nothing special in the story. It becomes commun that bitcoins can buy properties and luxury real estates. By searching the web, i found many other examples of houses being sold for bitcoins like a house in Essex which was bought with Bitcoin in December 2017, another sale in Texas was managed by BitPay in the same year. If the buyer and the seller accept using bitcoin, then everything is ok. The deal can be managed using any known paiement gate to convert the amount into fiat for a fixed price. Unfortunetly, the mentioned article doesn't provide a lot of details about the story and i can't find a valid ressource of it in the media.

If you check op profile, you will notice that he recently created his account here and start promoting articles in coinpedia. I think he is an advertiser or the owner of that website as the articles have different authors according to the website itself.