It sounds like she isn’t doing too well with her current instructor, has anyone looked deeper into this? Is it because of the big gap between lessons?
Different people learn at different rates. I had about 45 hours of lessons in total, no practice with a parent and passed my test second time.I also switched instructors after failing the first time (was due to location more than anything, but on reflection the second instructor was much better suited to me).
My brother had 6 lessons in total, loads of practice with my mum and passed first time.
My sister had more lessons and less practice time with my mum, she passed first time.
A cousin had over 60 hours of lessons, no practice time and passed 3rd time. He also took a year off lessons after failing the 2nd time.
My siblings and I are all now confident drivers on all types of roads and think nothing of driving across the country, it just took different amounts of time and money to get us to that point.
My point is there’s no definitive amount of hours required to pass the test and the way it’s delivered can make a big difference. Personally, an intensive course would not have went well for me. I found the lessons quite intense at the start and I was quite tired afterwards (2 hour lessons at least once a week). Also if you have a bad lesson where mistakes keep following on from each other it’s not as big a deal on a 1 or 2 hour lesson, on 6 hour day where you have a test at the end of the week it would be very stressful.
My concern would be that you spend a lot of money on an intensive course for it not to work out and then it takes ages to be able to save up to take more lessons. It would be beneficial for your or another family member or friend who is confident to take her out in a hired dual control car for a few hours to get a decent idea of where she is at and how she handles it before spending lots cash.
Also as PP have mentioned the cost of insurance for the 1st year is more than likely to cost more than the value of car you are talking about. Definitely worth considering if this is affecting before going down this route. Loads of people don’t start driving until their early 20s these days.