Started when I left the Army in 1973 full time until a drunken customer, female came up to me in the pub and said jokingly 'can I pay in kind again this month? ' unfortunately my wife at the time didnt see it as a joke and I was forced to find another job. Worst thing was I'd only cleaned her windows.
Cleaned windows part time until last April when went full time, with another partner! Loving every minute of it, wish i'd done it ages ago, worked through the snow, nothing compared to 20yrs as a sales rep.