If they are serious about cutting costs they would be rethinking the whole accommodation arrangement and be setting it up the Bethel resorts on a more dorm type arrangement. Most rooms look like they have one bedroom, a lounge, kitchen and bathroom. They could fit two in the bedroom and three in the loungeroom.
If they were desperately short of money, they could rent out rooms in the other buildings for anyone willing to come for a short period of time to volunteer.
The GB members may even be willing to give up their two bedroom apartments, freeing up more space.