IMHO and TBH, and in reality....
..it's this constant fag of changing systems that in practice, means you will maybe just want '
one system' that you can pick up and work with at short notice, hence despite a bit of extra cost, a std. wire (always 0.8mm) and nozzle in mine, and a hobby bottle or two even though I have a pub bottle of CO2 if I want to bother - is what I've settled on.
Currently stainless but can swop back to steel if lots of bodywork to do, but wouldn't for a quick and short run.
My gas welding bottles are 10 minutes away if I want them, but limited shed space (very) makes practicality of MIG and getting something (anything) quickly tagged together the real advantage of keeping the welder close to hand, and setup with lightweight bottles - all it needs is the helmet, a wire brush or two, the grinder and twist-knot brush and a 30M extension lead.
Oh and some long sleeved leather gloves and full-face-mask when I'm twist-knot brushing.. you really can get stuck in then.
PS. If the college is offering gas brazing or silver-soldering, give it a go... brazing is magic with bronze rods and a tub of flux. Stronger than many hobbyists welding and much less likely to crack!