F20 class is the only solution. And just make sure the N20 qualifies in similar fashion to what they did with the Taipan 4.9 (F16) and end the drama...
Swell also seems to be getting ready to produce a 20 footer so it seems plausible that other manufactures might be interested in participating.
"House prices have risen by nearly 25 percent over the past two years. Although speculative activity has increased in some areas, at a national level these price increases largely reflect strong economic fundamentals." – Ben Bernanke – 2005