All depends how good your PC/Laptop runs and what not. I have a reasonably good laptop that I've had for just over a year. Nothing top of the range or a gaming pc as more committed people do tend to have. (FM is the only game I play.) If I was to holiday a full season, it would take about a good 3/4 hours to do. I have done it a few times and just let it run whilst I'm at work or something like that. I personally like to do it myself, rather than downloading someone elses, just guarentees that there's been no unknown changes to my knowledge.