The 2m tower is perfect starting point for al your needs, whether it be inside or outside. Add extra parts later to g\reach higher or create long scaffolding runs ad roof edge protection.
All parts are compatible between towers, just add the wide double platform width end frames to create wide double platform width towers.
The bolt on spigot allows you to stack a narrow frame on top of the wide frame, which allows you to have two different width 3m towers and still have the ability to stack them together as a 5m tower.
Convert the CORE800 into a 3,4 or 5m tower by adding additional parts.