I'm very confused and I don't know if it's because something has been lost in translation, has been badly translated, has been badly written or has been badly researched.
If they bought the mansion, the real estate has no longer anything to do with the house.
If they're renting it, they still can't get evicted without any fault on their part. The landlord has instead to notify them of his intention to not renew the bail with them for the next year.
Admittedly, anything goes in a work of fiction but there's a big issue if people can evict rich people left and right without justification without anyone having said anything up until now.