The exhaust fitment on that is going to have to be a lot tighter than on a truck. Don't wimp out and say "good enough" on bad fitment.
In my experience, exhaust shops are wildly differing on prices. I've had bad shops do poor work and want a mint, and I've had a good shop charge less than I would have for their labor. Twenty years ago, the full dual 2 3/4" exhaust on my Cadillac cost me $250, and it rubbed on the driveshaft and leaked. I then took it to my now-favorite shop and they fixed the rubbing that the first shop said was uncurable, removed the chintzy clamps the first shop used, and welded the exhaust which cured all the leaks. They charged me less than $100 if I remember right. Just a couple years ago I had them fab the custom dual 3" exhaust on my Jaguar that ran from my headers, through glasspacks, to about a foot before the rear axle and it cost me about $150.