If you live where its nice all year then its cool. If you live where there is snow part of the year then dont get the mustang for your only car. thats just a really bad decision.
If your going to buy a mustang then get a real one... big V8, Stick, leather, upgraded stereo ect....
a V6 isnt a mustang, its a joke. Itgs for people who want to look like they are driving a Mustang. But then again....$800 a month at your age unless your independantly wealthy or your parents are paying is the highest level of stupidity. Trust me bro....I've been there.
Most people who have a hard-on for mustangs go into the dealer wanting the real deal. Then they end up leaving with a V6, auto, cloth interior shit stereo cause they get all practical when the douche bag dealer starts jacking up the price for what they thought they wanted.
Best option....find one thats 2-4 years old that has had money put into it and is badass. You will get WAY more car for less money.