man i didn't even know you could comment here, sorry for the SUPER late reply

Well, clients contact us if we have time for a project, we usually say (as we are) we are quite busy but we can take a look and negotiate. We sign NDAs and get a glimpse of what they would like us to do. We either take the work in or say we can't handle it at the current point.
If we can do it we negotiate budgets, assemble a team accordingly and get going.