Considering the quality of cyanogenmods "stable" releases, never. Hobbyist professionals are still hobbyists and not liable for the damage their code may do.
These kinds of challenges are pointless. It's true that living on a food stamp budget is hard, but it's not impossible.
The real trouble begins when you encounter unexpected costs. When you are living from hand to mouth you can't plan ahead for whatever mishap might happen, be it illness, a car crash or just about anything that might make your already tight budget nonexistent.