Thinking about buying some new make, putting it to bed, and becoming an NDP in a few years? Here's what it will cost you. This is obviously MGP liquid, but these prices are from an intermediary (not the distiller) who is willing to sell it in one-tote (i.e., 500 gallon) lots.
Rye Distillate (95% Rye, 5% Malted Barley): 135 Proof, $14.25/gallon
100% Corn Distillate: 150 Proof, $13.79/gallon
Bourbon Distillate (75% Corn, 21% Rye and 4% Malted Barley): 135 Proof, $11.68/gallon
You'll also need a license, barrels, and someplace to put them. And if you intend to make a business of it, you'll need to do it again next year, and the year after that, and the year after that, etc.
You can bypass the license, etc., by contracting with a DSP like KBD to barrel and age it for you. Given the willingness to kick in enough dough, this is something a SB group could do, just like a group buy of a mature barrel. If, however, you at any point want to sell anything to anybody, you'll have get a license.