Tenant asking for new windows

[Elliott Back]

I have a tenant that is asking for new windows in a rental condo I have in Dallas, Texas. Right now I have 2 single pane windows and two sliding doors that are also single pane. I have asked for one quote so far and they are going to be charging 6500 to do all of it (i am on the third floor, so it is a bit more in labor). I was definitely not thinking it would be that much. Do windows add enough value to make them worth it?