drag characteristics of a catamaran

I've built several kit boats such as the Pax20. I've also messed around with SUPS and am interested in building something that's basically a Catamaran- SUP. My rationale is that I like taking my dogs out with me on calm days, and they squirm around too much for traditional SUPs to be stable. I want to paddle, not swim! Cats have inherently excellent primary stability due to the spread buoyancy.

There are  a number of design considerations to consider, but what I'm wondering about now is how the intersecting wakes of closely spaced hulls will effect drag? Would one of these craft be reasonably swift, or a barge?

Input from someone who knows this stuff better than I would be graciously accepted, as well as reference books, forums or what have you.


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