I'm not sure Jay.
Cutitup, the thickest aluminum project I have forecasted is still 1/8". The Dynasty 350 does 225 amps @ 60%, the Syncro 250 does 200 @ 60% and the 350 does 300 @ 60%. The Dynasty 200 is 45lbs, the Syncro 300 is 500lbs. To get 250 amps @ 60% on a smaller machine requires 3 phase.
My MIG is a Millermatic 185 and it's been able to handle anything I've needed in the past 6 months.
The way I saw it, the Dynasty 200DX is THE best 200 amp machine with regards to all around portability, power range, and features. The probability of me needing a larger machine for personal use in the next 5 years is slim to none. If I decided I made a big enough mistake that I need to sell it, I shouldn't have trouble getting 70% of my money back quickly. If I get into thicker weldments I'd most likely step up to a Millermatic 350P.
As is, I'm equipped well enough now in welding to handle any of my needs, and I could make some side money if need be although I want to add a Hypertherm 1000/1250 in the reasonable future. Assuming I land this job, next up is some acreage, and a good sized shop w/ living quarters. Then add a mill, lathe, and plasma table. If I could work out the acreage near 3 phase, that'd be NICE.
It's a theory at least.
PS If I get in a bind, I do have access to the machine and welding shop at the community college.