That said, I doubt one could go at it alone with no support or with only a grant -- building up mind share, fighting off BS patent threats, and doing enough sales to break even on these non-development costs aren't the sort of things that a government/ngo grant will typically support. And even if you could find the money, you'll still need access to a network of experts.
Someone should setup a fund that force-multiplies government/NGO grants for societally beneifical OSS with funding and access to expertise for these other things (legal/marketing/etc.). The aim could just be breaking even on non-grant-funded costs by selling support/branding/etc. to institutional players like hospitals and large chains.