We can’t know the details for sure, but I think many of your figures are gross underestimates. For example:
Although some bethelites are abandoned in middle age, there are a considerable number of very elderly bethelites whose health care costs are probably extremely expensive in the last few months or years of their life. All the GB and their wives and branch committees and so on when they suffer from cancer, stroke, heart failure and everything else.
Maintining, heating and air conditioning such huge fascitlies in dozens of branches is likely to be a huge cost. Maintaining property is a huge expense.
And I think we may tend to underestimate the amount that Watchtower is spending in legal fees and compensation payouts already. Worldwide this alone may amount to tens of millions annually.
Plus travel costs for the GB and their entourage must be a considerable expense. And all the endless gstherings of COs, elders, branch members, technical staff, lawyers and goodness knows what else.
And paper is more expensive and they still need to print WT study magazines and a few other essential items.
And there are probably lots of other costs we don’t even imagine.
The other crucial point I make is that the idea that a religious organisation of this size and spread incurs costs in the region of $2 billion dollars is entirely plausible when you compare Watchtower with the Seventh Day Adventists. In fact they spend more than $2 billion dollars annually despite the fact that their membership is much more weighted toward third world countries than JWs.
