need a CAD design a tiny house shell with lean roof

I want a shell of a building CAD designed plus PDF.
12 w x 22 L x16 H foot
2 story with stairs, front door, windows
Made from wood and shingles, door
Nothing fancy, basic build frame plywood floor exterior plywood walls, plywood and shingle roof

First Floor
front 12' side, 36" door, 3'x2' window
both sides 22' 2 windows each 3'x2'
back side 1 window 3'x2'

Second floor
4 windows on the 16' height side
no widows on the sides or the lower slope side of roof