You are so young, and you have your whole life ahead of you. I don't know the percentages, i suppose you could look them up here on-line, but there is so much more to life than this one guy and this one moment.
If you love each other as you profess, please wait for each other to mature enough...
It would depend on where you're using these colors. If you're doing a painting on canvas, i'd suggest fuchsia.
If you're painting a room.... think i'd go with the sage.
The cost will be related directly to what the menu is....
If you stick to veggies and dips, it will cost less that roast beef sandwiches and shrimp.
Make up your menu and start pricing things... that's the way to keep your budget in check.
And, who'd going to make the wedding cake?? Vendors...