After graduation, just call them and ask for a deferment. They will bend over backwards to make deferring easy to do. In six months when your deferment is over, call them up and do another. Repeat as needed.
I wish I could have back all the money we've spent on cars, particularly new cars. The cost just isn't worth the financial freedom you have to sacrifice.
Everyone changes careers over their lifetime; why not experiment with one that you are crazy about? Worst case scenario, you go get that crappy corporate job when you're 28 and let the cool waters of 9-5ing wash away any memories of your failed Falafel-R-Us Gift Basket business.
You don’t need to save $50,000 to spend a year overseas. If you’re young, willing to sleep anywhere (hello, couchsurfing!) and go to countries off the beaten tourist track, then you can survive on much less (I’ve heard as low as $1000/mo).
If you wait it’s going to be more complicated financially and emotionally. Now instead of putting on a backpack and heading out the door, I’ve got to cancel leases, forward mail, set up online payment arrangements, sell a ton of stuff, convince my family that I don’t need an MRI “just in case this idea is a sympton of a brain tumor”, and wrangle with complex stuff like dodging the “when are you going to have kids” question.