Reasonable florist budget?

I have some florists I plan to visit but when they ask me what my budget is I can't really begin to think of a starting point.

This is what I need:
15-17 low centerpieces
1 bridal bouquet
1 MOH/3 bridesmaid bouquets
Groom/ 1 BM/3 groomsmen boutineers
2 father boutineers
2 mother bouquets (probably instead of corsages)
And maybe a few flowers at the church

What do you think's reasonable for this? I know flower choice changes price but just looking for a starting point.