Years ago one of our sons attended a wedding for a friend, and the guys who were part of the wedding wore Tux T-shirts.
The bride and her maids of honor wore Tees looking like a wedding dresses and maids of honor dresses.
The couple rebelled at the ridiculous costs of a regular wedding and did the T Shirt thing.
Their dinner was catered by a great pizza place with a portable outdoor brick pizza oven. The caterer provided a great salad and several pizzas baked at the reception. Everything was served on paper plates with plastic forks. An upscale bakery provided great cupcakes for those attending and a big two tier cupcake for the bride and groom to cut.
The groom worked for a winery, and the winery provided the wine and the outside area for the wedding with awnings, tables and chairs for the reception. They limited the attendance to stay within the codes.
The new couple used the money saved as a down payment on a new home.
Sounds like a well-grounded, very sensible couple. I hope it all worked out for them.