Revenue is not equal to profit. Adding in $3000 from each manufacturer could add a huge amount to the operational costs of one of these businesses, further redu

Revenue is not equal to profit. Adding in $3000 from each manufacturer could add a huge amount to the operational costs of one of these businesses, further reducing margin and therefore profitability. Additionally, your average home mechanic should be able to deal with most things on a Tesla with the exception of high voltage electronics. That schematic charge prices your average Joe out of the self repair market almost instantly.