Farfromoz
You can (or used to be able) to do the PPL in Welshpool in the UK in three weeks - Mon - Friday - but they may have gone bust.
You probably could do it in 3, but it is intense. Try doing more than an hour of crosswind circuits solo, and than have to think about the next lesson. It may seem glamourous, but a nice steady pace (IMHO) is much more tolerable (and when I started I was all for racing through!)
Remember, about half of the hours will require a briefing, which may take up the time too, so you may only get a couple of hours per day max. And don't forget the laaaaggg.. that you'll have to recover from.