If it were me, I would purchase the kind of property in California that Twerkle would give both H-Bombs nuts for.
It would remain property of the crown so utilities, taxes etc. and any maintenance work, remodelling etc. would be approved, organised and paid for by the Crown.
That way, the Harkles have somewhere to live without any cost to themselves. Everything else, they pay for.
The Crown wins by having an investment property, the Harkles win because a huge expense is taken from them and everybody else wins because Twerkle can't divorce H-Bomb without losing her dream home