Just to clarify, the issue isn’t tool consolidation it is really just the number of USB drives. On a good day i can be working on 6 machines at the same time and i’m somewhat fed up with having to keep 6 identical USB drives updated.
I understand that MDT is out of scope for your project. But the link I provided with “booting mdt 2013 lite touch”. Really has nothing to do with MDT itself other than delivering a WinPE environment to the target computer (which MDT uses to start its environment). If you have a WinPE environment on an iso image, you can use either method to deliver that to your target computer over PXE. Your target will boot from that iso.
In that case i am somewhat confused since your tutorial specifically mentions starting out with an MDT server. What would be the best way to get an existing Win10PE iso with built in tools and such working? (assuming that is possible)