If you're not billing a real temp desk right now, this isn't for you yet. No hard feelings. Build the desk, come back.
It's 33 minutes. Most people watch it in two sittings. It saves your spot.
I won't guarantee you a number. Nobody honest can. Your desk, your market and your effort decide that. What I'll guarantee is what you leave with: your plan, your priced client, and a straight answer.