My issue for a group of 25, though practical and manageable will not work for me. On my mother's side of the family I have over 50 first cousins and close to 30 on my father's side. Add in spouses, children, parents, grandparents, the sick and feeble, the logistics does not work. There is no way to feed us, take care of our medical needs, take care of our waste, transport us, the list is massive of why it will not work. But the only factor that might work is the love we have for one another. It would either be our saving grace or our downfall, either way I'm all in with them. Though we would instantly have an army of hundreds, and there is a large percentage who are or were in the military. Watching my uncle cook at the family reunion every year shows his experience cooking in the military.
As for the original list, I'd like to see a few more grunts, you need the "gofers", the ones who will go for this or go for that. From my time in a university atmosphere, the educated ones are great in there fields but useless out of them, with a few exceptions of course. as you stated at the begging, "First off I confess I'm not anywhere close to doing this but I would like to have a rough plan in the future for getting a group together." A plan is a great place to start though.