Maintenance is paying small costs before deterioration chooses larger ones.

The choice is not between paying and not paying. It is between paying a small predictable amount now, on your schedule, and paying a large unpredictable amount later on the schedule of whatever broke. Neglect is not a saving, it is a deferral with a poor interest rate.

List the maintenance you have been avoiding and put dates against it. Choosing the smaller cost while you still can is nearly the whole of the practice.