Stable income: Somewhat stable

A laundry folding service can provide a moderately stable income source for most people who try it. From online sources and my own experience, many individuals earn consistently, with some variability due to demand fluctuations. If your best friend quit their job for this, I'd say 'That's a risk' but not overly risky. I'd rate it a 3 out of 5 because while there is a decent baseline of income, occasional fluctuations may require supplemental income or savings.