Build Info/Opinions-Plans?

Looking to build a Sailboat like the Goat Island Skiff (link below).

1. Looking for a open cockpit.
2. Looking for a 18' (if possible-two people).
3. Looking for at least 6'-6.5' beam at the mid/stern and able to beach the boat.
4. Looking for a single mast.
5. Looking for stability, not speed.
-I was also looking at Spira's 24' (reduce it down some) Sharpie, but it weighs 1400lbs and I'm thinking I can only shave off maybe 200lbs at that is what I'm thinking.
-I did find The Sharpie Book by Reuel B. Parker, but to me, seems to bulky/looks heavy (couldn't fine a weight to it) and not sure the plans in the book are readable so I would just buy the plans outright if I had to go that route.
-The Goat Island Skiff (for example) fits, but for my needs is just to narrow).
Thanks for the help,
Jim
West Coast, Fla
Goat Island Skiff Plans https://www.duckworks.com/product-p/oz-goatislandskiff-id.htm

 

Below are a couple of options with a ~6ft beam. A bit more searching and hopefully you'll find a good set of plans.

https://www.glen-l.com/designs/sailboat/gl15.html (only 15ft, but roomy for two people)
http://boatplans.cc/waller/waller-ts-540/ (small day sailer - might be option to consider)