I mentioned this boat recently. Claims 19 mpg at 8 knots.
http://www.multihulldesigns.com/desi...ock/38tri.html

Looked around a bit, and only found
http://multihullblog.com/2013/07/mor...maran-trawler/

The boat was sold last year - cheap, about $15k.
Sarasota Craigslist. Had 2 9.9 Yahahas on it.

Looks like there will never be "owner" reports on
seakeeping, accommodations and mpg.
Too bad. Have to assume the boat just isn't "practical"
enough to take hold.