Debt and Revenue Are Two Separate Issues
You need to ask why G3 Connect and Barry MacShane chose to invest in PVSP. Barry is an insider to both Wgat, PVSP, Ojo Tech, and the VVoIP industry. He understands how things are coming together and where LightSquared comes into play and I don't believe he has the wealth to throw away $500k.
Also, I think you need to layout a timeline of important events to occur over the next 9 months to get an idea of what needs to occur to remove the uncertainty around PVSP's (IMHO) pending success. For example, when/where do you place the FCC's decision on LightSquared on the timeline? Until this and other important factors become clear, the path to PVSP's success remains mired in discussions about debt rather than the scope of opportunities and the impact of LightSquared on the wireless VVoIP market place.
And, I think you need to come to grips about the challenges of marketing a disruptive technology like VVoIP. Until you take into account the seminal points inherent in "Technology Adoption Lifecycle" and the book "Crossing the Chasm", all will be chasing the wrong hopes. (Look in Wikipedia for both of these references.)
Certainly, there are no guarantees. But as has been said, the Trolls/Shorts have predicted the last 10 bankruptcies of Wgat and PVSP incorrectly.