Another thing, don't ditch VBulletin. You have paid for it, even though you now have to pay the renewal to get the updates, you can continue to use this version. Besides you have also paid for
VBSEO and if you migrate to phpbb or another platform, all your thread url's will change. Thus losing all your indexed pages in the search engines.
If you are going to do this you may as well start from scratch.
With regards point 8. One of you submit the site and do it today. I happen to edit that category.
Finally what is the real issue here, running costs ie hosting, software renewal or all of it combined?
I'd much rather have a cordial relationship with you all, than being seen as the enemy and from this point onwards, will ensure there is no gloating etc. As long as it is not to P & CA's detriment, perhaps I can help?