Timing belt

Should I wait that the timing belt brakes to change it or change it let say every 60,000 miles

It would help if you included the engine size and year. I’ll give you a clue though…this question is like asking: "Should I wait until my heart stops beating to see a doctor? The answer is of course…No! The timing belt should be changed according to the maintenance interval for time or mileage in your owners manual. You will destroy the engine if the timing belt breaks on an “interference” type engine.

And what if the belt breaks as you’re pulling out in front of 90,000 pounds of loaded Kenworth…?

Check your owner’s manual and it will tell you how often it should be changed. Waiting too long can mean it will break and in most cars that can mean not only having the car suddenly stop, but it can also destroy the engine.

well, if you hate your car, let it break, you’ll have a nice $3k plus repair bill, which you’ll get mad at the mechanic for giving such a high quote. You’ll then go out and buy a new car and be stuck wondering what to do with a non-running vehicle

Just for the record, there are no brakes on your timing belt.
;-))

On the other hand, if you meant to use the word “breaks”, then you need to consider the following:

Does it make sense to ignore maintenance when the lack of that maintenance would result in repairs exceeding the book value of the car?

You did not bother to give us details on the model year of this Escort, its condition, or other pertinent information, but the newest Escort (2002) in “Excellent” condition would be worth–at most $3,400.
If it is older and if it is in less than excellent condition it is worth less (possibly considerably less) than $3k.

If you intend to keep this car for any length of time more than a few days, why would you risk engine repairs that would at least equal the book value of the car, and might very well exceed its book value?

Maintenance is cheaper than repairs.