Should I buy a welder or pay somebody to do it for me?

I bought a 69 Firebird to fix up. I am trying to decide if it is worth it or not to purchase a welder and do the work myself or just pay to have it done for me. I have been too busy at work to eat let alone make calls around to auto body shops for estimates. I, for sure, need an 80% quarter welded on (came with the car), outer wheel well, driver side floor pan (just by feet if that matters) and driver side firewall extension. How much would a shop charge for the labor? I am looking at a Hobart 140 MIG, cart, gloves, and helmet for say $700 shipped (sears.com)…and a grinder for under $100-150 with discs and misc. stuff. So that’s $750-800 in tools…is that close to what I would pay in labor? If I did it myself I would have a welder and some more tools to add to my collection. Anything I am not considering? Opinions? Please don’t discriminate because of the fact I am a noob and have no clue what I am doing. Advice is accepted and always appreciated. Thank you all for your time.