If you could no longer flush your toilet because you were having plumbing problems,   or your commercial water supply was cut off and you didn't want to use your water stores for flushing, do you have a good backup plan,practical even for long term?

Going in a bucket with a toilet seat attached to it in your bathroom is one option, but then you have to keep dumping it somewhere. This doesn't seem like a good long term plan to me.

Now, if you happen to have a good independent water source and a way to get it pumped where you need it when you want it then you may not need to worry about this. But then again, if you happen to have an overcrowded house for a while, or maybe after a long term disaster or economic collapse your septic system has filled up and you do not have time at the moment to empty, it then an outhouse could really come in handy.