King Charles tells Britain to weather the cost of living crisis whilst wearing a hat worth 5 billion pounds.
(thespectaclemag.substack.com)
You asked how it would solve the homeless problem, then you answer your own question. Eight billion could buy a lot of housing. When the money runs out, the housing remains! It's crazy. There are many other treasures and the best property in the UK besides. What for?
Why would you defend the extravagantly wealthy royal family? They won't return the favor for you, you're not in their club. They provide you with absolutely nothing and are parasites of the UK.
They're an embarrassment, even more decrepit and almost as predatory as the USA.