That sounds awful complex. Wouldn't a simple piece of open source software and some easy to acquire hardware be a simpler and more reliable solution?
Depends on the application. Generally, I'd rather use a code library than worry about hardware.
That doesn't sound like it would satisfy the desired result:
Proving a PRNG is secure is a very difficult task and is impossible when the operating system is not built from source. Quantum mechanics are non-deterministic and thus provide an alternative method of generating randomness.