What time does it start (to determine how "hungry" the guests might be"?
How long will it last (to get an idea of the number of apps and prep/cook time)?
Is it a buffet or are the apps passed (more labor for the second)?
If buffet, single line or multiple separate stations?
You listed five (5) major apps plus desserts, at one (1) bite of each for each person, that's 1,500 plus, what, 600 desserts (assuming small bites)?
As a personal chef for over ten years, my "off the cuff" starting point would be around $6,000 ($20/person, if you quote the $/person, LOCK the headcount 2 weeks in advance!)). Given time to detail food costs, rentals, and labor costs, it might come out a little less, but probably not much less.
As a "rough guess", your food costs are going to be in the neighborhood of $2,000-$3,000 depending on your sourcing. Rentals might run upwards of $500 or so, and servers/helpers and kitchen help, depending on your area, might run upwards of, oh, $250-$400 per hour, probably with a four hour minimum so say $1,000-$1,600.
So, your "costs" are going to be somewhere around $3,500-$5,100. That doesn't leave a lot of room for your fees, $900 to $2,500 for two to three days work, or $300-$800/day, maybe.