What is your best methods?

ABC = face with 3 "sides"
BCDE = face with 4 "sides"

ED, BC, AC must have same number of segments (control points) ?

For the surfaces : Sweep, Network, Lineweb(then some networks), Loft ...?
Surface by surface then join it?

If I want some thickness what is your best tricks?
Shell or sweep a profile, boolean Diff 2 volumes ...

Thanks by advance for your advices :)
I took the image's plans from here: Seegull by Alfred Mylne 1903
http://15marins.blogspot.com/2008/07/seagull.html