From what I know Kollel wives don’t have a problem at all finding jobs. (Here in Chicago.)
Some teach in the local schools. I think there is a strong demand for that.
Others work in local businesses.
(There was one who got a high level job at a big frum nursing home company here, and when they moved back she even opened an office for that company back in NY!)
Others choose not to work. Something probably not possible for Kollel families in-town.