#1: Will you be using your entire development team? Will this take place at your main office? No lie there, then
#2 Unless the client is a one man show, if I work for the client (consultant, contract or employee, what is the difference? Do they expect the Budget or Procurement people (who probably actually signed the contract) to call? I would certainly want my support people to talk to someone who knows what they are doing.
#3 Never in a million years.