Gas burning 182: $443,500. Diesel burning 182 (11 gallons per hour): $515,000. Difference $71,500. Depending on assumptions, savings from fuel repays capital cost in maybe 2000-3000 hours. Interest on purchase load is 7%, and the annual cost for additional interest is about $5000. Can you save this much per year to break even and save nothing? Hmmmm.... Sounds unconvincing to me. Going to have a marketing problem.
However, in parts of Africa and elsewhere where there is no avgas and thus no other option....
F