Snare and racket is correct about the CO coming through and telling the local elders that their KH is not up to par and that a rebuild or refurbish is needed. The CO then writes this in his report to the WT.
The local elders shrug their shoulders and figure that they are behind the times and need to get with the program. They are instructed to pitch the rebuild to the congregation.
When the congregation hears the "recommendation" and are asked to vote on the proposal, they do what all good sheep do and vote positive.
The following are all designed as money making activities for the WT Society where they control the costs and demand payment without an itemized bill:
Kingdom Hall builds
Kingdom Hall insurance
Assembly Halls
Circuit Assemblies
District Conventions
Circuit/District cars and insurance
Health insurance for COs/DOs