I did 150hrs PPL, Night and Multi in 7 weeks (should have been 8 but was ill for a week). I was very tired at the end of it all.
Dont forget about the weather, I was in Florida and about 5 days in total were not flyable due to wind, fog and thunderstorms.
I would allow longer than 8 weeks to complete it all - I suppose its achievable expecially with glider experience.
good luck
Jinkster