26' steel scow cruiser

A scow hull form is designed as a cargo carrier and could support steel construction, its also about the easiest hull form to design yourself, its a box so very easy to calculate volume etc. You will probably need to design it yourself, fortunatly everything you ever wanted to know about scows is available right next door in NZ. They built some of the last commercial scows and certainly the prettiest with quite an attractive bow shape. There have been several very informative books written on kiwi scows which you can find online. Scows were used in many parts of the world but the kiwi ones were certainly the best looking and unlike the rest, well documented in print
There have been a few pleasure scows built but most larger than you want, one I liked was a 32ft ketch named Revival built in Auckland in the1970s.

Steve

 

That's interesting, thanks, found this: http://www.woodenboat.net.nz/Stories/Achievablecruiserf/Achievablecruiser2.html

 

You might find some inspiration in Dutch traditional boats - something mashed up from elements of a Zeeschouw, a Staverse Jol and a Grundel maybe? They certainly have the steel part licked.