[Adrian]

You will have to recover or recycle on this one for sure.
Legally, you are most likely to be required to have a transfer permit from your city, a dump station permit, and possibly a vehicle transfer sticker.

Proper insurance coverage.
Hot water.
Stronger chems. Possibly Sodium Hydroxide based.
Drain dams.
Ventilation .
respirators.
Co-ordination with business to empty out all the bays and equipment to park while cleaning. ( harder than it sounds).
Suface cleaner.
the list could go on and on as to what bases you have and have not covered due to the information you have provided.

But,.... since you are more accustomed to resi cleaning I have to say that, the shop would be a different ball game altogether. Esp., due to the cost of rising materials.

Not trying to discourage you by any means. If all your bases are covered to the obvious needs, then it's yours.
The cost of being current, compliant and legal is unreal. To me it is not worth the fine of "not knowing".

I am sure you will get varying replies about your rate, if, in fact, you are asking what to quote. I would certainly get the resi rate matrix out of my head on this one.
Good luck.