My question was put on hold and closed:
Reason given was: "We deal with mainstream physics here. Questions about the general correctness of unpublished personal theories are off topic, although specific questions evaluating new theories in the context of established science are usually allowed."
Kyle Kanos agrees with me that the elements I use in my question are mainstream physics but he thinks the combination of them is not. Sure, it won't be possible in the near or even quite distant future, but IMO it's a valid question and I've seen equally theoretical questions, even one about black hole power plants.
Please review my question and reopen it if it's on topic here. Please also read the comments of Alan Rominger and Hypnosifl.