I reckon it would take between three and four weeks to complete your PPL if you're going to do it full-time. That ought to allow for bad-weather, passing (and studying for) the ground-school, and achieving the flying skills required to successfully pass the test and apply for your licence.
Although if you're going to commit full-time, you might want to complete the ground-school subjects before embarking upon the flying side of it. Once you've got all the theory covered, the pressure can ease a little bit because you've only got the flying to concentrate on.