While this device looks awesome and would be really helpful, I don't think the fund raising strategy will work out. Especially not the goal for certification. And without certification, it's essentially useless for human medicine.
What might work is approaching charities eager to develop this device for use in the developing world.
On the contrary, if he only sells to end users, I don't see the need for the long and expensive certification (especially as he is based outside of the USA). This is not intended - I hope - to replace hospital ECG machines, but rather to provide quick insight at home.
I think it would serve the purpose better if he uses this money to make it user friendly and polished.
What might work is approaching charities eager to develop this device for use in the developing world.