“When I say Takanah I don’t mean forcing anyone how to act. I mean a communal recommendation to stop this unnecessary expense. Thousands of dollars are spent collectively each Chasunah on one time use gowns, do we really need it?”
I wore the same dress to two sisters weddings when they were two months apart. I also haven’t gotten rid of my other wedding dresses just in case I have a chance to wear them again.
If the women in your family are unwilling to wear a wedding dress multiple times, that is a personal issue, not a communal one.