How Realistic Is All This? An Evolving Assessment

Obviously, we are not going to see huge hotels coming up at the Near-Earth Asteroid region any time soon. The problems discussed elsewhere on these web pages are all serious, and as long as we must depend on Earth-launched materials, nothing very large can be built in Space. Until a healthy Space-based economy is functioning, there is no particular reason to build large radiation shields and habitats - there is no demand for housing there.

Now let us look at the technical realism here. The criterion usually used by most people to assess the practicality and realism of a given concept is:

"Has this been done before?" No, not exactly this, but in developing the concept we have sought and found proof of the feasibility of the key components.

The power levels required for Radio TFF construction are well within reach, and are far less than what has already been demonstrated using Earth-based facilities.

In 1974, a signal was sent from Arecibo into deep space. The dish was ~305 meters. It transmitted ~20 trillion watts in an omni-directional broadcast (2*10^13 W). It was sent for 169 sec. The frequency was at 2380 MHz and the equivalent wavelength was ~12.61 cm.
 
courtesy of the NAIC - Arecibo Observatory, a facility of the NSF.Photo by David Parker.
See http://www.naic.edu/about/photos/aoviews.htm