It's ridiculous how you have to be so accommodating to the little prick in order to get your money! You shouldn't be nervous about going in strong just incase he decides to walk away.
Why on earth do you need to give them time to raise the funds for the repair. That's what these ridiculously high interest rate companies are for on the TV. Let them get a high interest loan then it's up to them to pay it off. Cheeky Bar Stewards!!!
You shouldn't even need to get 3 quotes. Just tell them your repairer of choice and that's it...PAY IT!