Well, you can't really be adequately trained in one without the other, if you are going so far to claim being an expert (I am not by any means), since after all, the Teotihuacanos influence on the Maya (in all their forms just about) left an indelible mark that can still be seen today in the modern Maya style of art. Teotihuacan was known by its contemporaries as the 'place where the gods met man' (or something along those lines) for a reason. It is even debated whether or not Spearthrower Owl was a ruler in absentia of Tikal, (Spearthrower Owl having been one of the rulers of Teotihuacan I believe). In any case, you are right about the difficulty of applying 'painted stucco' but it could be done with a modified texture pack and using wool as your medium. None of all that has been said between us detracts from how great your work is and I really hope to see you finish it.
It's definitely inspired by the Hopi, but it lacks any of the wooden support beams that would run the length of the roof, to provide support. You would be able to show more detail if you scaled it up by at least 50% more.
Mexica valley structures were indeed covered in plaster so they could be painted with red or green paints, this is a more recent discovery seemingly (despite it being recorded in conquistadore findings).
Ink sacks were always at least marginally useful, they functioned as a black dye for wools. But now, this book editing update has me ecstatic because I can now write custom books for my rp server. Hooray Jeb!