I think you can totally ROCK IT with a $1000 budget. Just be smart about it and get creative! Don't go out and buy everything today... price shop: wait till plastic utensils go on sale and use coupons. Buy frozen burgers when they are on sale and keep them in your freezer. Go to the dollar store for decorations (candles, balloons, tablecloths, etc). Consider making cupcakes instead of buying a big cake. You don't need to cater it, get friends to help however they can (on the grill, setting up food...)! Don't be discouraged, you can do it!!! At the end of it all, it's a PARTY with your friends and family, how much you spent/skimped shouldn't sour the occasion!