The wedding itself is not the big expense.
The wedding itself is a massive expense, including all auxiliary expenses. Sure, there are other things that cost like support and furniture, but the hall and package(FLOP), gowns, clothing, makeup, etc. are a huge expense that is largely unnecessary. If we could just make them in bar mitzvah halls with fewer guests and less frills there are many thousands of dollars in savings to be had in a Lakewood takanah wedding alone. Keep in mind outside of Lakewood even a takanah wedding is significantly more, and a for a non takanah wedding they’d save tens of thousands.
Let alone the Vort, Aufruf, and Shabbos Sheva Brachos which each alone is larger than a wedding back in the shtetl.