Regional hubs may be the answer, but where are they going to build the overnight accommodation? Who are they going to get to staff the accommodation? Who is going to prepare the meals these cadets are going to eat?
If it is anticipated this burden will fall to the VGS staff, then I would suggest there would be fewer and fewer staff. Has this idea been fully thought through or are the powers that be just working on the assumption that volunteers will be only too willing to help out with a greater workload...
To my mind, the only via option for the VGS organisation to work with a reduced footprint is to move to permanent, paid staff in key roles, and supplemented with volunteers.