PPL has it's advantages as the majority of the skillsets are transferable to gliding (especially SLMG) and to a lesser degree microlights.
With a limited time frame you need to be studying met, air law, radio, etc so that any theory exams are guaranteed passes.
FWIW I got a PPL on taildraggers in 3 weeks and 1 day, (would have been 3 weeks but the day of the GFT was unflyable), I've since converted to gliders and haven't landed out yet, haven't done done a >150nm cross-country either but I'm probably overly conscious of the fact that it hasn't got an engine!