Yeah,
If MIG is your process-of-choice, which makes sense, for trailer stuff, the I-Mig 200 is a good choice at around $650, especially since it will Stick weld too, for those time when welding outdoors makes MIG a little less than ideal.
Otherwise, I?ll recommend that you step and consider the 211Si, as it has 210 amps, does MIG, Stick, and DC TIG (and includes the TIG accessories, including HF starts and a gas solenoid), sale-priced right now at $999. It?s real multi-function unit that has no competition (since it comes with the TIG package and HF arc starts).
You?ll undoubtedly be happy to have the added TIG process at some point, especially for only a few bucks more.
Otherwise, 1/8" or .125 is easy on Everlast units (like mine) via their dual-voltage capacity, but 220/240V is undoubtedly better for heavier chassis portions of trailers, especially if MIG is the process, I'd think. But then, you may even consider doing TIG roots, with MIG cover passes on 120V at certain joints.
I'm using my 210EXT in an unattached garage lately, that only has 120V power, and I'm really liking the performance there, having used it previously and exclusively at 240V, before then. But I'm speaking about TIG only.