Bingo !well....er......what would you suppose a Studer A-820 or Ampex ATR-102 might retail for today as a clean sheet of paper, brand new product? when you look at the level of engineering and quality of transport?
$175k.....maybe $250k. and that's only if they did a run of 500 to 1000. otherwise much more.
these brand new $10k--$50k machines of today compare to the $750---$3000 machines of 40-50 years ago. they did not do 30ips either. not saying that the 30ips engineering problem is not doable, but at what cost, and at what level of reliability, how that might raise the resultant retail price, and how many would you then sell?
not my area of expertise at all, much more yours. but actual execution of a more robust product changes the math.