Sanya, you always make good points, but I think we should finish this stage as usual, and then switch to your system or a system similar to the one on KI HeroesPortal (where a player completes the entire campaign without saving), but that's not crucial... I think the deadlines should be something like this: 3 months for each campaign, for example, we start stage 3 in winter, stage 4 in spring, and so on...
P.S.: Respect to Kolbzer for his persistence! ;)