I did it in 9 months along with a full time job - 5 days a week 9 - 6pm
On average 3 - 4 weekday evenings maybe 4 hours = 16 hours
plus at least one day at the weekend - say 8-10 hours
more coming up to the exams - which I did in 3 sittings
So approx 25 hours a week for the 9 months
Good luck !!