dont get one with dpf as it will cause issues with that sort of driving.
Look out for turbo's going due to poor servicing, they have a breather above the turbo and this is often ignored and has been revised in design as the old one glogged, starving the turbo of oil.
Clutches wont be cheap, approx £400-500 quid job
They have a common issue with dsc/dtc iirc and again, not a cheap fix.
Boxes are a bit stiff 1-2nd gear especially and she might not like it, give her arm ache etc if she is doing a lot of short trips.
Runflats are not cheap.
My mates have had them, we picked one up of a gent who clearly enjoyed cars and looked after his, it has been trouble free for 3 years.
My other mate got one of a minted bird who was not ontop of servicing and they had the turbo go, clutch, dsc issues etc etc and just chopped it in as it was costing ££££££ in repairs, one thing after another.
If you buy one, buy carefully, but I would suggest looking at other cars if you are buying in the bottom end of the range money wise, it may cost you.