How Many????

What is the min # of Calla's I can put in a trumpet vase without it looking flimsy?

the dimensions are 16' x 3' opening.


My vision is:

trumpet vases with calla's
on top of mirrors
surrounded by votives and rose pedals

I may throw some clear rocks/ crystals in each vase for added height and umph too


looking into a flower wholesale place and I plan to DIY ( i was quoted 10 bucks a stem b/c of the Labor Day Holiday ....no way I dont even like flowers)

Thanks!