Ok, so cycling is not a 100% solution and won't work every single day. I did not mean to present it as such. Even if only 50% of days are suitable for cycling,

Ok, so cycling is not a 100% solution and won't work every single day. I did not mean to present it as such. Even if only 50% of days are suitable for cycling, if it saves her an hour a day then, at her hourly rate, a decent bike will return it's investment in less than half a year. And that's assuming her bus rides are free. She/a person similarly situated would have to judge for themselves whether it is a useful tool.