Couple of points to consider:
Why 172s if you are going on to Arrows? Not a huge change, but other schools I know use either Warrior/Arrow or Sundowner/Sierra. OK so I personally dislike the 172 and others might not, but it does seem odd.
Are you a CPL instructor, razzele? Those hours are somewhat on the low side of what is commonly found in schools even for someone just starting to teach CPL. I undertand that a change is due and the CAA wants all new CPL instructors to have commercial experience so of course that will mean it is unlikely new instructors will have less than 1000 hours, once they have the required instruction experience too.