At that point I was kind of done.
I would be too. Most of my experience has been with the Rosco and Jem machines, but also have some of the older Chauvet Hurricane foggers and have used a few ADJ machines over the years. I've still never heard of a case where you can't run a machine all day so long as it's got enough fluid to do so (nor have I ever killed a machine doing that).
Sorry to hear this happened to you, and what's worse is that their service team was less than helpful. I'm soon to be in the market for some new semi-budget machines myself and will definitely be counting out ADJ!