Seems to me that there is a very simple (simplistic) solution to all of this. If the Army are so short of trained pilots, why not expand the TA to take in other bases as well as Netheravon (I'd like Wattisham please). This would allow a whole bunch of suitably qualified personel in training and support roles to do a short conversion (maybe in the USA) on the AH64 and join the front line anti-tank squadrons in short order.
The good thing about this is that it would free up the support jobs to be taken on by many of the very adequately trained pilots who post on Rotorheads (have to join the TA of course, bit hard to swallow for an ex fish-head). It would not be just Weekends either. The roster of a professional civilian pilot is such that days off are not necessarily taken on weekends.
The Army Brass need to be told of this plan immediately as there is really no down side. Everybody's happy, they just need to stump up the cash.