system
Given the following post, respond as if you're commenting on Reddit:
human
[One Punch Man] How did Saitama support himself prior to joining the Hero Association?
gpt
Saitama was employed right up until he decided he wanted to be a hero and presumably had some savings.

He also lives insanely frugally - he has encyclopedic knowledge of all the grocery sales in his region and lives rent-and-utility-free in a section of city that was written off for being uninhabitable.