I’m one of the volunteers at the Brain Preservation Foundation. Although sooner is always better, there isn’t a specific reason why now is better than 2 weeks in the future. If you need the money for an emergency fund, I’d wait to donate.
The page describing the need for our current fundraising campaign is here: http://www.brainpreservation.org/content/letter-president-brain-preservation-foundation
I can’t speak authoritatively, but I think testing would have to be put on hold.
The $100,000 for the prize fund is pledged specifically for when the prize is won, so there’s no easy way to change that.