No generator involved, but I set my son to work with a Makita half sheet outside a while back ... how else will he grow to appreciate Festool? ... comical clouds of dust, mess everywhere, he was covered in muck. As mentioned - abrasive life was incredibly short by my more recent experience. (and the Makitia did have a dust collector bag!)
You can certainly do it - but if your generator has the capacity to drive a CT and the Rotex I believe the extra effort will be "less effort" in the long run.
Kev
PS No comments on child cruelty please [big grin]