For what it's worth hand planing can be done rather efficiently considering the results and creates an unbeatable finish. How long would it take? 12" x 12" x 19' I figure the second timber done would take 1 1/2 hrs for the three side, while the first one would take 4+ hrs assuming one has to tune up their planes. Personally I prefer a #3 and #5. Don't forget the butchers
wax!
I'm includig two pictures, let's hope they make it on.
P.