I'm very sorry to hear about your dad, my thoughts are too your family. For your centerpieces try the Christmas Tree Shop, they have a lot of cute things cheap! That's where my best friend got hers and they came out beautifully. Just try to stay positive and remember everything will work out fine, that's what I've learned. I know what its like to just get out of college and try to grow up in a hurry. It'll be ok. If I think of anything for flowers I will let you know. As for invitations, thank you cards and table settings try Big Lots I just bought mine for $2.00 a box (the martha stewart collection) and you just print them out yourself. Its nice because you can design your own print and everything, personalize them.