Despite this thread being a decade old, the rescue tiller idea is still going. I recently came across Asheville, NC's new Rescue 3, a 2024 tractor-drawn KME.
https://kmefire.com/wp-content/uploads/2025/04/Segment-001-of-KME-FDIC-2025-Sell-Sheets.pdf
https://www.instagram.com/reel/DIgeZURxxCm/