I had a look at the houses Mom of 5 posted. They're very nice, but obviously staged to show them off. What occurred to me is that for any new owner moving in, the purchase price would just be the start.
I suppose it's the same for anyone moving to somewhere new but whereas you or I would spend a bit of cash but have to save up or make do with stuff we already had, H&M would want everything new. From floor covering, curtains, furniture, appliances, lighting, decorating, to just normal household stuff. Then there's the artwork, mirrors, vases. And flowers. Lots of flowers.
And the wages for the staff you'd need: interior designer fees, cleaners, laundry, pool maintenance people, gardeners and general maintenance. Caterers for parties and other sleb stuff. Not forgetting utility bills. The list goes on.
Neither of them has any experience or knowledge of money management. They are both so entitled and deluded that they think the fairies will sort it.
Even with Charles subbing them, they're both living way beyond their means right now, and their ambitions for a house in A Lister territory is pie in the sky.