@thwunk you know, i did'nt say no other server will be needed, only to focus on one to don't expand debugging work with latency issue. In more if you look to the GIP project obtained by DS :
The program awards SpatialOS credits that will cover SpatialOS and Google Cloud usage costs, including underlying server fees, during development.
So opening a new server in period development won't be "so difficult".
So if you're in New Zealand, how is the ping to a North American server East/West coast to a diablo-like game (not to a 3d mmorpg) ?