First pressure washing bid need help

So I am doing my first pressure washing gig. It is a Starbucks drive though that is 166 ft long and 13 ft wide for a total of 2,158 square feet. I am renting a hot water unit that is 3000 psi and 3.5 gpm. I am using kd-330 brown soap. how does this sound so far? Also I need help bidding this job. Is it typically “xx” cents per square foot? Thanks in advance for your input.

Here that it is going for about $150 to $250 a service. I also recommend you use up to at least 5 GPM if you want to get the job done in a reasonable amount of time.