The quick answer
Saltwater pools still have ongoing costs: testing, balancing, salt when needed, electricity, filters, cell care and eventual cell replacement.
Routine chemical costs
Salt changes slowly, but pH, alkalinity and stabilizer still need attention. Hot weather and heavy use raise chlorine demand.
Salt-cell ownership cost
The cell is a wear item. Output, balance, scale and run time influence service life, so replacement belongs in the long-term budget.
Cleaning and filtration
Saltwater does not reduce the need for skimming, brushing, baskets or filter maintenance. Those tasks account for much weekly labor.
Professional service pricing
A weekly plan may cost similarly to traditional care because cleaning and testing remain. Ask how salt, acid, stabilizer and cell cleaning are billed.
Avoidable expense
Control pH, avoid oversalting, follow manufacturer guidance and investigate low production before replacing parts.