Is there still a bunkhouse at Headcorn? I'd be inclined to get down on a Fri evg - maybe even get a flight in if you can get there for 1900, and then aim to fly twice each day on Sat and Sun. That would be enough to take in, IMHO. If you could take the hit to the social life, and you are quick to learn, then 45-50 hours might be do-able by October if the met god is on your side.
Tempting as it may seem, flying three times in one day might be too much?
ISTR that there are one or two B+Bs not far from Headcorn, and there was a camping area!