I'm sorry, this is not how federation works, and if it were truly as limited as "one activity at a time", moving a community to an entirely different continent is a fantastically short sighted idea.
Moving geographically closer to something else is important if you need real-time savings (e.g. high frequency trading, scientific research). ActivityPub is an asynchronous communications protocol built upon technology with decent if occasionally dubious reliability. Doing something this drastic to shave off ~100ms is not correct.