if it brakes your ac will come to an abrupt stop.
lol
im not sure what your really asking, how about put new batteries in the remote?
if it breaks you should get it fixed or replaced. level of skill to replace it isnt very high, not sure if you can handle it though.
Midasize?
Yeah window units are pretty much disposable unless it's a 240V unit, if that's the case pull it and take it to an AC repair shop to fix it.
For emergencies like this, I strongly recommend a large exhaust fan on a thermostat. If it goes 5 degrees above your AC's set temp, kick that big fan on so your girls don't cook. If that's not an option, get a high temp shutdown relay for your lights so they will turn off.