@dave247 As long as you're putting the same edition (probably Pro) that came on the computers you don't need a volume license for every one, because they're already licensed for that edition from Dell. You only need new licenses for computers you want to upgrade from 7, 8.1, etc.
You need a single volume license to get imaging rights.
Yes, I kind of forgot about this, but this is what I did. I purchased workstations with Windows 10 Pro on them and then a single VL for imaging rights. Then, I created a custom Windows 10 image and used this single MAK for activating the images (automatically in MDT task sequence). the Workstations haven't had any issues activating or anything.. but maybe I didn't need to do that part.
I guess this makes my original question pointless now since I realize I am talking about a whole different situation.