I have a background in truss design. It's possible some back woods counties may still approve of site built trusses but the majority would not. Most commercially manufacturered trusses aren't that expensive, unless you're getting into a cut up roof design or wanting an attic truss. A straight run of trusses is quick and easy to build. Mecklenburg and surrounding counties require sealed truss drawings. When I built my 900 SF garage, the slab was $6800 by itself. I've got a little under $30k total in it. That's with an attic, exterior stairs, vinyl siding and widows, 30 yr architectural shingles, insulation, drywall, and HVAC.
