I'm British so to me $10 million is worth about £6.5 million
As I live in Notting Hill in London, that money (and I'm serious about this) wouldn't buy a house in my road. It might buy a nice, two-floor apartment, but that's still offensively expensive.
I would be more likely to just use £2 million to buy a smallish apartment, use £1 million to buy somewhere for my mum, invest £1 million in a mixture of equities, bonds, diamonds and maybe a small business, put half a million into cash to use later and set up a charitable fund with £2 million that would in turn be invested to produce an income to help children in this country.