True... Parts do tend to last much longer than the same of its Japanese counterpart.. but when they bust off., remember its about 3 times the cost as well.
On my Opinion.. X1 is not the best option to spend 6 million of hard earned money and to get stuck with it. You do very well know that BMW and other luxury brands have a massive depreciation after being sold... and specially when it goes off the 1st owner as well.
So., unless you got money to burn or not the side chick of a cabinet minister...

.. I suggest you look for a much more smarter option that would actually hold the value you spend in the long run.
Basic thumb rule...buy Japanese... in much better sense... why not you and your wife buy two Honda K's ... or One Honda K and a Honda Hybrid ??
Honda K for you two to bug out and enjoy and Hybrid to take kids to school and do family shit ... lol