Is there some special "trick" that makes your team/approach so efficient or (just) the usual ones, e.g. less overhead due to small size, less bureaucracy than big pharma and so on?
It would seem difficult to raise that kind of money from other than big pharma or typical pharma capital market sources who would want to see a large pay-off from such an risky investment (i.e. selling it in countries which could afford it).
Best of luck in any case!