I feel I should point out that it's not going to cost 1M for the day/night cycle, it's going to cost 400,000 for the general improvements Larian wants to make, 100,000 for the dynamic stronghold that changes based on your choices, 150,000 to add talents and personality traits, 150,000 to turn the generic henchmen into companions with attitudes, quests and choices, and 200,000 to add day/night cycles, weather effects, and the associated NPC schedules and reactions.