If you are asked about money, it is best to go with the:
“It is the job not the money.” And then if you really want to, you can say “And I want this job”.
The reality is that you are interviewing through Ambrose and your CV will have a figure on it. Let us handle the negotiation and it avoids you having to cheapen the interview by haggling. But if the client really wants to haggle then you have to, so be prepared to talk about money.