Customers using the self-serve car washing option could control how much money they spent.
"One of the attractions is it's a coin-driven system. You can spend $2 or $20, depending on how big or small your vehicle is and how dirty."
The Dunedin site was popular among taxi drivers, who spent $2 a day for a high-pressure rinse.
"It's 24 hours, any day of the week. If the kids are getting a bit much at home you can take your car out and clean it."
Mr Hudson said another incentive was the car wash's eco-friendly approach to wastewater.
"You'll use up to 60 per cent less water at one of our sites compared with somebody washing their car in their driveway.
"At home, all that residue goes into stormwater systems and ends up in rivers, lakes and the ocean."
From Friday, June 19 to Sunday, June 21, the business is running a promotion weekend, with free washes for all customers during office hours.
"It's a little different but we're keen to get as many people exposed to self-serving carwashes as possible."
The carwash will be opening its doors before the promotion, with tentative plans to kick off at the end of this week.
It's also running a competition on Facebook, where people who like and share its latest post will go in the draw for a year's free carwashing.
The new site is expected to create new jobs in Hawke's Bay, beginning with at least one full-time position as well as part-time positions.
Havelock North-based Mr Hudson is also the man behind Coastal Cowhides, which sells cowhide products to raise funds for his daughter, top New Zealand alpine ski racer Piera Hudson.
To find the carwash on Facebook, use the keywords: The Clean Carwash Hawke's Bay.
