On Expedient Shelter/Greenhouses: You are right the human waste was to be baked and re-cultured before being introduced into the system guess most of us don’t have a small reactor to provide the unlimited heat/radiation as a Mars expedition would have. I think there are enough collective brains amongst SurvivalBlog readers to design a concept pop-up settlement for vehicular bugout or being forced from your primary retreat.
On Mobile Ham Gear: The ADSP2 is a good unit (only DSP unit I have used please suggest better) if you can find them at a radio shop, on sale they go as low as $70 they have the ADSP2 board inside for less then the board itself is sold. You can solder in a switch for the filters and add a headset jack, or just pull the board and install it inside your radio, instructions are on the Internet. It really makes extended monitoring less exhausting.