Daniel Carr might have some advice on just when to purchase the silver planchets, if that is the route we'll be going in.
But I'd like to get back to the issue of putting in an order, by using last year's experience for attempting to figure things.
Last year Daniel Carr set up pricing in this fashion:
-- Design charge - I forget the cost, but it was like full price for the obverse design and half price for the reverse.
-- Die charge - X price per each one, obverse and reverse die, or by the pair, I forget.
-- Minting/Metal/Finish/&c. charge - combined charge per medal planchet struck. Copper and Brass nearly equivalent, silver higher. Slight different charge btwn prooflike and satin finishes. There were also options for medal numbering and Airtite capsules.
OK, given that set of parameters, the price of the individual medals was contingent on just how many were minted, since the more minted cuts back, fractionally, on the cost of the design and die charges. So, in our case last year with the 6 different styles of 38mm medals, the order was large enough to dilute the design and die charges per individual medal. One reason this was so is due to nohope's order of 60 medals alone.
Now, if we attempted to outright purchase the 63mm medals last year, more medals on top of the 38mm design would drop the fractionalized price of the design, since that didn't change, being digital, but would have to account for a separate 63mm pair of dies and then the planchet charges as well. Again, I don't recall what the die charges would have been, for this 63mm medal, but it was likely fairly significant, and whatever higher price 63mm planchets would cost. Added to this is that the 63mm order would only be of one type of medal, in terms of what was offered last year, so it would be more difficult to dilute the die charges for this one.
I suggest that we get Daniel Carr to break things down again this year, in terms of what demand seems popular, and then do the math to approximate just how much each type of order will be.