The statement that it is impossible to complete the game in less than 20 days.

He already knows.:)
During the playthrough, we discussed daily and in great detail how it is possible to complete the game in 10 days and why it is feasible.
We also discussed the topic of the anti-magic garrison. As a training exercise in management techniques, there was a suggestion to create a starting save for Sergey with any number of troops for the starting hero. And to confirm that it is still impossible to complete it in less than 10 days. Because the game is not held back by the garrison, but by the problem of the hero limit.