Scope first
You haven't asked anyone for a price yet. Most homeowners start by phoning three contractors and asking what it would cost. Every one of them prices a different job, the numbers come back thousands apart, and there is no way to tell who is cheap and who just left things out.
You get a written scope of work in your words, a checklist of what to send each contractor, the questions to ask each one, and the comparison structure so the bids come back on the same footing.
Requirements and outcomes only. I do not draw plans, specify assemblies, or size anything. That is architect and engineer work, and I am not one.