The OP doesn’t state what type of inkjet printer he/she is buying and how many pages per day/week/month are printed. All printers and copiers have a recommended max number of prints per month.
For example, this mid range inkjet https://store.hp.com/us/en/pdp/hp-officejet-5255-all-in-one-printer has the following specs:
"*Monthly duty cycle Up to 1000 pages
Recommended monthly page volume 100 to 400 pages[8]
[8] HP recommends that the number of printed pages per month be within the stated range for optimum device performance, based on factors including supplies replacement*"
Compare that with this business printer: https://store.hp.com/us/en/pdp/hp-officejet-pro-8210-printer-p-d9l64a-b1h–1
"*"Monthly duty cycle Up to 30,000 pages
Recommended monthly page volume 250 to 1500"*
Note that the number of pages is typically based on 5% (~a page of double spaced text). Graphics multiply that % coverage and count as multiple pages towards the Recommended monthly page volume.
The following is from Ricoh regarding their copiers, but the principal is the same:
"What does a printer duty cycle or monthly duty cycle mean?
As with any new piece of equipment, you want to know if it’s going to be suitable for the type of work you need it to carry out before you buy. Part of the manufacturing process is stress testing. This is where the item is deliberately pushed to its limits, often to breaking point, in order to determine its maximum capacity to perform whatever task it is designed to do.
In printers, the duty cycle is the number that’s based on the results of stress testing. It represents the absolute number of pages that can be printed per month at the rated print quality of a machine. In other words, the duty cycle is intended to show how much a given printer can produce over a one-month period without any errors or jams.
If the stats for a printer indicate that the duty cycle is 1,000 pages per month, the manufacturer is essentially saying that you can expect to print a maximum of that volume per month without any issues. This does not mean that you can produce that given number of pages each and every month, but it is an extremely useful figure to use when comparing printer quality."
Source: https://insights.ricoh.co.uk/digital-printing/why-you-should-know-the-duty-cycle-of-your-printer
If you’ve ever leased a copier and the lessor finds that your monthly page count is too high, resulting in excessive service calls, they’ll either require you to cut down your printing or get a copier with a higher recommended monthly page volume. I worked at the print department at OfficeMax and when our copiers hit a certain number of copies, typically in the millions, they’d swap them out for a new one. The copier they removed would then be leased to a company that didn’t have as high monthly volume as we did.