I recall a few years back there was a local needs part asking congregation members to keep on the lookout for suitable Kingdom hall sites. This was before the LDC existed. There was a lot going on (mostly renovations), And many people going out to work at various sites.
With the formation of the LDC, I haven't seen much activity at all. Have they finished all the work and plan to sell the renovated halls as they consolidate the congregations? I would imagine that they can survive for many years on the real estate profits. The current GB will no doubt be long gone before the money runs out, so they're home free.
I believe that the whole overlapping generation change is to allow the current GB to escape the consequences of their actions, and leave whoever follows holding the bag.