I managed 35 hours towards my PPL before packing it in. My enthusiasm wasn't quite what it could have been as I was just doing a couple off lessons a month (if that)..
It's worth having a few lessons initially at your own pace to get a feel for it before committing too much money. Any club will support you in that decision, as ultimately they want you to be happy with them and be keen to progress at your own pace. My club allowed me to pay in installments without having to commit to paying for the complete course.
I quit having only managed to fly solo on 3 occasions. Looking back I do wish that I'd had the opportunity to be able to take a couple of weeks off work and just blitz the remaining hours. Because I wasn't getting the hours in on a regular basis, I could see the cost of the PPL spiralling upwards.
I got such a buzz from the landings!!!
(I'll gloss over the fact that I managed to cause some damage on my first solo)