Here the pricing: http://spaceflight.com/schedule-pricing/#pricing
The MEGA prototype appears pretty small, so a CubeSat could hold a few of them.
Add some retractable solar panels to power them.
It should be doable inside a 10x10x30 cm volume for 300k$
My concern is, with 300K they could be able to afford to pay some expert in chemistry to develop some specific material for the MEGA.
A better solution would be to crowdfund a prize (maybe with the support of the X-Prize Foundation).
A 1 M$ prize would move around 30 M$ funding in projects to win it.
And would make a splash in the media.
My main concern is Woodward, Fearn, Boldrini, etc. are all academics. What we really need is an intrapreneur; a capitalist that see what is possible and WANT to get it done.
I know people here don't like Andrea Rossi and its claims about LENR and its e-cat. But to accelerate the development of a Mach Drive we need someone like him. Because there is a serious buck to do if someone develops a working Mach Drive and that motivate people a lot.