Sure they can afford to scrap bad boards. Damn, it's the best thing for them to do. Initially.
Fuck the cost, think of the cost of their first deliveries not being on time against that, and cancelled orders.
Get the initial couple of dozen or so units out of the door ASAP, gain the kudos for that, then relax a bit and test chips once they have that milestone achieved.
IF they get 50 perfectly working rigs in customers hands (literally since they are collected), get some good feedback... the lion's share of orders are october delivery so they'll have more time. Then they can test and not waste components.
That's part of my assessment, especially because the deadline is a bit of a headline-making one. If they meet this deadline and/or simply make folks really happy, you can expect SHTF and folks will be lining up moreso than before, placing orders. Their coffers will be full for awhile.
I really want to see KNC and Cointerra delivering and going head to head.