Due to space considerations, plus a completely unreasonable limit negotiated with the Favorite Dragon, I only have 20 models & it stays pretty constant at that number. That is not to say that I don't scheme & plot to surreptitiously increase the mother-lode, but the Dragon has wicked radar & can smell a plot before I even think of it.

Three is the ABSOLUTE minimum, but about 200 would be a really good number.