Could anything else go wrong?

Tomorrow is my day off and I had planned to take my car to the shop for brakes. They have been grinding for about a week and I am getting nervous. I had the appointment and was getting ready to finish up work and take my car over there and meet my husband for a ride home. Half an hour before the end of work I got a text from him saying his car had died and where should he have it towed. Then he said that we wouldn't be able to take my car for brakes. I blew up and told him that my car was unsafe to drive the way it was and it was darn well getting the brakes done tomorrow. Long story shorter, his car is at one shop and mine is at another. We borrowed his brother's car until tomorrow since my hubby works in their business and wouldn't be available without it. His car is so old and isn't worth much. So how much should I spend fixing his car before just trashing it and getting a cheap used car? He has a 98 Escort that has been nothing but trouble the last few years.