OZ-FLYBOY,
I agree with Icarus2000 and Chilli Monster. From a student perspective, consolidating your flying lessons is the way to go.
I did all my flying training with Warwick Dand @ Royal Newcastle Aero Club in Maitland, NSW, generally flying once a fortnight but sometimes only once per month. I also had a few significant periods where I didn't fly for long periods, either due to the fuel contamination problems or trips O/S.
I found that, with regular and careful study of theory, I was able maximise the benefit gained from time in the air. However, before any flight test (ie solo, area solo or GFPT) I would try to squeeze in 3 flights a week, which did assist in improving my flying skills, as there was a real benefit to having regular time in the air.
However, the way I learnt to fly was not, in my opinion, ideal. RNAC also trains students for Newcastle University, and those students progress very very quickly, no doubt a result of flying (usually) at least once a day. I would suggest that you try and do what a few private pilots (including one from the UK) have done and basically take a holiday and do nothing but fly, having completed all the study beforehand.
I also agree you should shop around. You might even be able to take advantage of "quiet times" with some of the larger training organisations who train uni students or negotiate a "block time" deal - I know there are a few schools out there that are hurting.
You might also pick the location of your school carefully. I see both pros and cons of learning at a busy controlled airport - becoming comfortable with busy controlled airspace vs added cost associated with lengthy taxi and holding. For me, learning at Maitland made sense as it was (fairly) close to home and was in a reasonably quiet CTAF, so I could concentrate on flying. However, I would not be as comfortable flying around Bankstown as someone who learnt there, as I have not experienced controlled airspace or high traffic volumes. I will acquire the skills needed to fly into aiports like Bankstown during my nav training.
I also think you should pick your instructor very carefully - no good having a great school but a lousy instructor. Like anything, there are different skill levels and different levels of application. I was very very happy with my instructor, who is an experienced GA pilot, is not "building time" for an airline job, and enjoys teaching people to fly. If you get those qualities in an instructor, you will be a step ahead.
Good luck!