Personally I think, the reason why they are always a group thing is because this is done IRL as well. Now I'm not trying to use this as an excuse, but I think the majority of us experienced at least one LEO faction's academy, which lasted a minimum of 2,5 hours. Imagine doing that for the few individuals that couldn't make the group sessions and all of them separately, that's another 4x2,5 hours. It's way easier to just do it in one go with most if not all of them. I still support the point of giving private academies to those that really can't make it that weekend, but in case the applicant is busy for the next few days as well then he might as well reconsider applying for that drive.