my .02, to start, a rack of nuts and the equivalent of bd .5-3. That should get you through quite a bit of stuff.
Some people won't agree, but I think in general, hexes are a waste of time. cams are light enough that weight-wise it doesn't make much of a difference in your pack and they're much more versatile and easier to place. I have a bunch of partners who have bought hexes and they've now sat in their basements for years.
watch for online deals, people selling gear and sales in stores, don't pay full price for anything (unless you really really want it right now).