People have gotten married in a nice suit and dress and lived happily. It doesn’t make the marriage any stronger to spend thousands on a specific gown for weddings only, and buy or rent a tux. For my first wedding, I wore my nicest dress, and he wore his best suit. For my second, the groom and his two best men bought matching suits that were also suitable to wear to the office, or to someone else’s wedding or funeral. Or to court, which is where I last saw that husband and recognized the suit.
My soon to be mother-in-law made my dress. The materials cost less than half as much as the fancy wedding hat I just had to have. A dress advertised for bridesmaids or for prom might be perfect and cost less. We bought good quality silk flowers and reused them for other things after the wedding. We were married around graduation time, and all the professional photographers were booked up. Our brother-in-law took the pictures and did an excellent job.