Mike,
I go through nearly exactly those histronics in design. It sounds like your formulas are very similar to mine.......I hate to have 2-3 bunkers per hole. I prefer some with none and one with 10 like you do. Again, similar formulas. And, if you have them after just a few course designs, imagine how forumulaic you might be after 50!
I also was brought up in the biz to distinguish a gca from a "player in the dirt" (like a Tour Pro) Design does mean more than art. It means applying some logic to maximize the value of every design element. The upshot is that even without budget concerns, it is possible to question every bunker and why it is placed where it is (in 99% of cases, yes, they are placed, or even at Sand Hills, the holes routed to the placement of natural bunkers) So, if in reviewing my design, I have used more than a few bunkers that don't provide full measure as hazard, target, looks, etc., I question whether I am a professional architect or just playing in the dirt.
In the end, not many of my clients would buy an explanation of "willy nilly" for the placement of bunkers, but you have been fortunate to start your career with a private owner who didn't ask many questions or put too many limitations on you, i.e., start with a dream project. Not many can say that!