Getting a large group online without losing anyone

Yes — the business page covers bulk ordering, paperwork and delivering install codes to each member.

Put them on a friend's hotspot for now and fix it at the hotel, since installation itself needs internet.

One regional plan cuts the organiser's workload, with no border-by-border profile swapping to coordinate.

Yes, recalculate every time the head count changes. The result is simply the product of the numbers entered, and even one or two people fewer or more shifts the total.

Not necessarily. Members genuinely use different amounts — someone who films or live-streams often may need more than someone who just uses chat and maps. The figure this tool gives is a group average, not a size everyone is required to match.

That depends on the model doing the sharing and its operating system, not a figure this tool sets or knows in advance. Check that limit directly in that phone's own hotspot settings menu.

Yes, separately, since each team has a different head count and usage pattern. Calculating per team gives a figure that matches each team's reality better than lumping the whole group into one number.

First try adjusting the per-person figure based on what the group actually discusses about its own habits, then compare against a regional plan to see whether it beats buying separately per country per person, rather than cutting the data down without checking with members first.