Re: Yes, yes, but
1. The NASA Deep Space Network is a ground-based communications network for communicating with satellites and spacecraft, not "hardware in space".
2. The Iridium satellites remained operational when the company went into Chapter 11; they weren't in some dormant state waiting for someone to come along with the right keys to wake them up.
3. Just about the only part of the US military that doesn't use Iridium is the nuclear submarine fleet; at the frequencies and power levels Iridium uses you can barely use it through a glass window, let alone underwater.
4. Along with the satellites comes the obligation to safely deorbit them at the end off their lives. You might need to stake rather more than $10m to persuade anyone that you could do that.
Other than that, great post, very informative.