You’re missing the point. Forget business models, kits, and profitable engine packages. I’m talking about homebuilding. Homebuilders don’t have money and aren’t interested in starting an airplane business. They just want to build because it’s fun and go flying as cheaply as possible. The builders here on HBA are constantly crying out for suitable and inexpensive engines. By some almost shocking lack of insight and creativity modern car engines are almost universally ignored here. This, despite the fact that they are free, everywhere, and SUITABLE for an enormous range of light airplanes. Can you imagine what Pietenpol, Evans, or Wittman would have done with the bewildering array of light, powerful, and essentially ready-to-fly engines that are available to us?The market says the same thing, year after year there are dozens of new engines presented (Friedrichshafen, Salon, Ila), with great promises of more affordability by going a bit smaller. Not a single one of those has survived to date... simply because the economics don't work.