That's a great deal on window cleaning. You should hang on to those guys. When I built my house 17 years ago, with getting older in mind, I tried too make it as easy as possible to maintain. The sashes tilt into the house so I can stand inside the room and clean them inside and out. Once tilted in you can twist them sideways and take them all the way out if needed. They cost a little more but it eliminated the need to get on a ladder to clean the outside. I also put brick and vinyl everywhere I could to eliminate painting outside on a ladder. Now that I'm old I'm glad I did.