The best thing I find I like about window cleaning isn't the money, it's Monday mornings. In my previous occupation as a soldier I hated Monday mornings with a vengance and the dread of them would and could taint the preceeding weekend.
All I thought of was the jobs I should've, could've but hadn't done; problems; duties I had to do, but didn't want to do and a whole host of other stuff. Life was complex and stressfull then. I ran a team of guys (and gals) and did a 'proper job' within the army, but was usually over-tasked and under-manned.
Now, after a weekend's rest; I'm raring to work come Monday morning. It's my best day of the week since I'm knackered by Friday.
Being a self-employed window cleaner isn't easy; the weather over the past eight months has been uncomfortable; but overall, window cleaning beats the pants out of other alternatives I've suffered.