I would stick with a mig welder for now if you have no welding experience.
Tig welding takes some real time to learn and requires alot of finess.
Chances of getting proper penatration with less warpage is easier with a mig welder.
I am a certified welder (Tig,and Mig) so I some what like to think I know what I am talking about.
At my shop a have a Miller DVI wich allows you to switch the welder from 110 to 220 just by switching out the plug. This will come in hady becuase you will not have to buy 2 different welders. One for welding thin sheet metal and one for welding thicker material.
Good luck with the classes and the purchase of a new welder.
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