I really appreciate hearing everyone's thoughts on the distinction between a quote and an estimate. I think I am seeking an estimate and the conundrum I am facing is that the Timberwright wants to start the design process and I am still trying to figure out the "trust" part of what was described earlier. I am trying to nail down all the aforementioned factors (species, finish of timbers, spans, and bent design) while leaving the joinery decisions for the most part, to the Timber Framer. I have tried to design the frame such that the floor plan is simple and flows from the bents. Are there other details that I could resolve that could help me at least get a quote?

It's also nice to know that Sketchup is fairly ubiquitious as a format and are useable during the process.

Thanks.