Ok, first of all, you'll have that gun for life (barring theft, or sale) so consider it an investment. And if you're already a gun owner, I can't believe you didn't already have a rifle suitable for deer hunting. Shit, I hunted with my MAK-90 for years. Got several deer with it.
Secondly, unless your turning it all into summer sausage, why not process it yourself? Not as hard as one might imagine. Believe me, it will taste alot better if you do it yourself.
And even if you do turn it into sausage, the price you'll pay is not that more than you'd pay for bologna by the pound.
I paid $12.00 for my tag this year, and got probably 30 pounds of meat out of it (I shot a SMALL buck, hardly bigger than a dog). That works out to less than fifty cents a pound.
But then, I don't have to travel to hunt deer (a five minute walk and I'm there), I don't have $100 invested in camo (actually I never hunt in camo), no tree stand (hunt on the ground), and I process it myself.