Thing to bear in mind with the Beemer you like is that, as I understand it, it is built on the same “chassis” and engines as the Countryman. The one on the scheme has the small 3-cyl engine and lacks the “go” of the 4-pot in the Countryman on the scheme (also no 4×4 in the Beemer).
More info on the Countryman in a thread called “Mini Matters” where Mitch writes clearly and concisely about his one. One thing I would say with ANY of the Minis is test drive one for as long as you can. The ride can be remarkably firm and you need to be sure it is not going to further knacker your back. (Bit worried about my Cooper S for said reason.