I believe it is possible to to play this campaign in about a year with either a two player game or a four player team game. In the former, while 1 player is on the west front, the other is on the east front. A typical move in EP 14 campaign takes only about an hour or two hours max. In F 14, once you get into making daily moves, you can, believe it or not, wrap up a move in 2-3 hours. Two players should be able to make 3 moves a week = 150 turns in 50 weeks. In most cases, a decision is usually reached well before that. If not you'll need 70 weeks to play out the complete campaign.
In a four-man game, it might go a bit quicker but it should be done in about 1 year.
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This is a great wargaming opportunity! Don't be intimidated by the seemingly massive size. Once you get into the flow of it, the moves become second nature. Give it a go! I would except my eyes have been bothering me but I am speaking from experience, this is doable! jonny