The manager never really had spending authority or was overruled by the next level manager. Manager moves on. New corporate direction. The list goes on and on. Just keep it in all in perspective.
Sales is a numbers game.
It may not be your proposal. In my experience, the guy who wants the proposal in 15 minutes is trolling for prices, or has already bagged the gig for a friend and wants a second proposal to make it look good. Friends on the inside told me none of the projects ever happened. The guy needed to show activity, I guess. Training is one of those things that managers find it easy to think about.