As I understand it, they were acting as their own general contractor on the Warwick project. (This, in my opinion as a former real estate developer is a bad idea but they didn't ask me). So they need a lot of tools and equipment for a long time. Renting the stuff you need for a project that size doesn't make sense, you need to much of it for too long a time. So they bought it, they shouldn't have trouble reselling it to recover some cost.
I'm trying to work out in my head if they could keep some of it and rent it out to congregations building new halls. It might make sense, but they'd have to truck it all over the country, building the cost of that into the rental rate may make it so expensive that even Elder Dumbjon could figure out he was paying too much.