A friend had an independent service workshop for 25 yrs until he recently retired. Had 3 bays, 4 reliable mechanics and a loyal clientele. His total annual diagnostic subscription fees for several marques (essential for logbook servicing) were in excess of A$25,000. On top of that add two Bosch diagnostic tools plus sundry assorted connection leads (another $10k) . Then there were various Govt levies, EPA etc, insurances, business operating licences, hoist certification.... the list goes on. All in all his overheads were close to $1000 a day before he took account of wages. No wonder the hourly rates are up!!