Why does the Watchtower place a harsh burden on it's low-paid and low-skilled army of Witnesses? The District Conventions don't really add much value,
I think the DCs are a huge Ca$h Cow for the WTS.
They often get the rental sites for free or almost free.
They often use free JW labor to do work at the facilities in trade for rental.
They are wiling to book weekends that are going unused at the facility, ie, places where you have multiple DCs at the same site where often they are not even on consecutive weekends thus requiring a complete tear-down of the Convention site (stage, sound, etc). So what? FREE labor doesn't matter.
These bring in huge amounts of ca$h to the WT coffers with minimal expense.
Doc