you are as old as you feel. also a widow, here's some food for thought.
Manayunk is hilly. Do you have any physical limiations that working hills is a problem ?
Winter ice and snow, get someone to clear for you, or will you take care of it ?
Myself staying around the young, can make you feel young, is that what you want
ditto the rent for a year, thought interests rates are so low your wasting 8-10K.
Get an experienced realtor, the younger realtors don't really know this area, your not the person to take on their learning curve