I bought a HF da, was like $50.
I'm not a body guy, and I didn't use it that often.
I did some small areas, bumper covers and small dings and what have you on cars I sold - maybe 10 repairs, a front clip on a maxima, and a ranger pickup bed.
I did do something I almost never do and loaned it out. They had it for a couple three days. I know they were painting some large truck tanks (pump truck). I oiled it before I gave it to them, and asked that they oil it - but who knows?
I was stripping my 94 olds 88 down to bare metal/plastic and was about halfway through when the da gave up the ghost. Lost all power and was junked out inside.
I went to my local paint store and bought a Hutchins da, I think its a model 600, and was about $150 if I remember correctly.
It finished the Olds with no issues, and I've used it on a couple other small things since. If it does encounter issues I can get parts for it, but often I discover parts end up being such a large portion of the replacement price they don't always work out financially.
Anyway, I guess only time will tell if the Hutchins outlasts the HF by 3 times as much or not, but I suspect it will. It doesn't cut as fast as the HF, but seems smoother. I believe they both have 3/16 stroke?
Like the OP I just wanted something for occasional use when I got the HF da, and it did last me for 3 to 4 years of what I consider light use, but it sure sucked when it died and I had to buy another one.