An optimal team consists of seven (plus or minus two) team members. With the piplanning app the only thing that counts is how many teams you have in your ART. Each team with an active team license gets their own Team Board and a swimlane on the Program Board. You can have as many people in a team as you want. It will not effect your license costs.
Yes you can do that. For more details please reach out to firstname.lastname@example.org.
Over 80% of all Agile Release Trains worldwide have to deal with the challenges related to distributed teams or individual people not being on site. With an average ART of 12 teams the costs to book flights and hotels are in most cases between $ 20,000 and $ 30,000 per PI Planning. With only four PI Plannings per year that's already $80,000 just to get teams to look at the same boards.