Aaron needs a new AC

I live in south Texas and my AC has died. I have AHS but the home warranty only covers parts and the rest of the repair is $5000. My AC unit is over 20 years old and I can get a replacement unit for $12,000. I'm trying to raise funds to get a new unit for my family before the temperature reaches 100 degrees. Due to the wiring in my house and the age of the home, window units are a very limited option because we can't run a small AC and anything else on that same circuit. Any help to allow us to keep our son at home over the summer would be greatly appreciated.

Aaron, Gina, and David DeVore