I am highly suspicious that at the regional building committee level there were dishonest dealings and kickbacks going on. In one congregation where they did a refurbishment the initial estimate required specialized equipment that a brother happened to own to do foundation work. This would have added 50000 dollars to the cost of the project. the rbc told the congregation that if this foundation work wasnt done they wouldn't do the renovation.
It it turned out that the congregation couldn't raise all the money and the brother sold his machine and the Reno went ahead anyway without the foundation repair.
Another congregation was forced to upgrade their sound system to be in compliance with what other congregations had for the tune of 10 grand. Priced out on line the sound system is at the most 2000 dollars.
Somebody is making money on some level.