My understanding:
1) The client has purchased all the fabric and batting for an 80x80 quilt
2) You are planning to charge her $150 to make it - she doesn't have much money
3) You want a down payment of $50 now for your labor
Is this correct?
She probably is already suffering from sticker shock!
I think at this stage of your career, $150 is a fair price. You will get some experience without any financial outlay of your own -
if my understanding of the situation is correct.