My friend is like this - he is keen to know everyone's details! He worked in finance for many years, so I suppose that might account for it.
I mentioned that DD and SIL were looking to move house in the next year, and immediately he launched into:
What's their mortgage commitment?
What's their budget?
What's their credit rating?
Have they made an offer?
What Council Tax band will they be in?
My answer was:
Dunno
Dunno
Dunno
Dunno
And dont be so bl**dy nosy!
In fairness, he is very knowledgeable about such matters, and always willing to help, but I do find him very intrusive!