A couple of points...
On travel..
You can generally get your flights cheaper, though this site is primarily for international discount flights, but works well enough on american ones.. if you go to igougo.com
Make sure, you select whether you want just a flight from them, or a flight + hotel. Then, after you make that selection, check every website at the bottom . It goes through all including priceline, and brings up their cheapest and on some, removes booking fees to save you an extra 15 or so at a time.
For example, right now, it tells me I can get to Budapest from San Antonio for 620 round trip including hotel.
I used it to get my NY trip for 220 round trip from San Antonio to Manhattan. Love that site. I dont use priceline anymore now..
As for venues... on where to meet and what to eat?
What is welcome for everyone?
Meaning.. there are quite a few things to pick from here. You can go for a few hundred dollars for dinner, or 3 dollars a plate awesome mexican food..
Give me some suggestions and I will throw out a few locations that could encompass everyones likes and dislikes..