Welcome,
How long ago did you start this business? IMHO, if the guy told you 115 000/yr, it could be that he has been in the business a really long time and has established loyal clientelle, or he could be plain out lying, so if i were you i would research this venture well, and look at potential custopmers, and if they already have an established window washer doing their windows. Hope it works out for you, cuz 4 sure you can make money but there is stiff competition.