one of the several reasons that i am applying to tepper is coz my wife is in pittsburgh and that way i can stay close to home. Is this is good idea to mention this or not?
Personally for you, that's a great reason to choose Tepper as bschool of choice but for your main essays, it's a rather weak reason. If you want to, mention it as a side note (not more than one or two sentences) but I would focus on other reasons for pursuing Full Time Tepper MBA. It's a very competitive program to get into.