Mostly good advice here. Truly it’s your wife that needs to make the cost cutting decisions. How much for a dress she wears once? We had over 250+ guests and made that budget work because she was amazing. Get married in winter, she made all the flowers out of paper, and look for all the pitfalls. We spent more on a turnkey hotel/venue but didn’t have to rent tables and covers. They had ok food (same as any other wedding) but we got more excited by the breakfast menu and saved nearly $5/plate. Having an open bar is important, but does it need to be top shelf?
Remember you are making two families into one. As much as it’s about you two; it’s also about your guests.
Congratulations and good luck! If you do this right, you only do it once. Lastly, Bitcoin is a means to gain wealth but what good is money without memories and love?