Trailer: 3000 8.5x18ft
Framing:
12x8x 4x4 doug fir framing = 10.98 * 12
5 roof trusses, doug fir = 100 * 5
60 * 1x4 interior studs = 3 * 60
900 sqft of interior tongue and groove walling = 6.98 * 225
10 rolls insulation = 14.68 * 10
Windows * 8 = 100 * 8
Door = 100 * 1
300 sqft tin roofing = 36*10
ice and water shield = 100
roof ply = 300
front railing = 150
Mouldings= 300
Okay, for a interior complete, but no fixturing yet structure, you're at
132
500
180
1600
150
800
100
400
100
300
150
300
___________________
4712
+ trailer @ 3000
___________________
8000ish
leaving 3000 for interior fixturing, and 7000 for domonprofit.