Well yes, there are characteristics to look for in a good grinder, but the question you seem to be asking is "what are the least expensive grinders capable of producing a usable espresso grind?". In my experience the Baratza line are well designed and have excellent manufacturer support. But even there, the Preciso is the least expensive machine with the adjustability to produce decent espresso. In other words - there isn't any free lunch, as you probably suspected. There have been some promotional packages of the Crossland CC1 and the Preciso or Vario grinder showing their heads in the last few months. That is probably about as good as anyone is going to do in the under $1000 category.
I know there are those who say get an old Gaggia Classic and your Capresso Infinity, then work to improve your skills. In my experience, that is simply a formula for frustration. I tried the cheap route first myself, and I have the scars to prove it.