Thats a deal.

I charge $250-$500-$800 for a schematic model (depending on size, complexity, etc) - I include enough info to get some quotes on, including a prelim timber list, all 3d in SketchUp. Output delivered is 2d JPG images or PDFs.

I do some preliminary sizing and some consideration for location, snow, wind, etc. so we can get in the ball park. Final engineering would come under a full build package.

A full build package can then run anywhere from another $1000 to $4500 (and more) depending on what you need - PE stamp on the design for permit, stick drawings, joinery details for every piece, foundation and footer / pier design / etc.

In the end, unless you have experience doing this, or local resources, you do get what you pay for.

Lots of friendly folks in the TFG that are willing to help, up to a point.