We have no idea what the marginal cost of the engine is, but it's far lower than the total cost of developing an engine, and the more they build the closer they

We have no idea what the marginal cost of the engine is, but it's far lower than the total cost of developing an engine, and the more they build the closer they get to $1m, $500k and towards the $250k target But even if it were $2m, there's 3 engines, that's $6m, leaving $4m for a bit of steel out of that $10m budget.