Adding another profit center to a carwash is usually a good decision if it is physically possible and financially feasible.
Would express interior detail service be physically possible given size, shape and other characteristics of the site?
For example, minimum requirement for express detail bay is 18’ wide by 25’ deep
Reason is the smaller the bay, the harder it is to work around the vehicle with
doors opened, the slower you go.
Reflective walls and bright lights are needed for meticulous cleaning.
Customers must come out of vehicle.
So, is there a comfortable place for them to wait or something to occupy their time or a clean bathroom so they can relieve themselves and wash their hands?
And so forth.
Purpose of feasibility is to determine if program would generate sufficient gross sales to justify improvements (investment) and provide adequate profit and return.
Consider market viability.
Full-service benchmark captures about 10 percent of wash volume as express detail. Flex-serve benchmark captures about 30 percent.
In bay benchmark is sales volume 11,000 X 0.3 = 3,300 or about 5 cars per day.
Consider technical feasibility.
Express detail implies 20 to 30 minute service time, start-to-finish, no appointment necessary, first-come first-served.
Delivering this on a consistent basis requires a team of two people. So, even a part-time program would have overhead of $30,000 (includes payroll).
$30,000 / $30 average price (excludes wash) = 1,000 cars or about 3 cars per day.
Conceptual profit = 5 cars – 3 cars = 2 cars
Figure unit variable cost of between $2.50 and $5.00.
With this information (plus improvements), you could calculate net operating income and return on investment.