I started window cleaning after chatting with a friend who had done it before and wanted to leave his night job to set up.... We canvassed and bought a small round together but after about a year he gave up and i bought his half with a bank loan, also had a full time job in sales at the time so once the windows built up enough i left it and bought/canvassed more work
Them were the days living at home with nearly 2 full time wages !!
I have never enjoyed window cleaning day in and day out, its ok at best for me, but the money is good, and now i have a family and high outgoings there is nothing else i could do to earn similar money in the flexible hours i work, as i left college to start earning as i was impatient, which i regret at times, although i probably would never of worked for anybody as i am far to self willed to listen to an employer, i quit most jobs i ever had because i didn't like the way i was spoken too by so called "superiors" and at the time i couldn't face another 3 years in college and a few more in uni!! as the course i was on was aimed at degree level ...
So in summary

i am happy with the life style window cleaning gives me, the money is good, and the flexibility and freedom is great! But there are down sides, however there are disadvantages to every job so you just have to accept that and stay positive!