I've played for over 30 years. I have two pianos in my house - a 1930 Gulbranson player piano and the Baldwin I got when I started. I wouldn't have any other.
The biggest curve she will have is that the church likely has a grand piano (or baby grand). They are much harder to play just due to their longer linkage. Her fingers and hands will be mighty sore.
I wish you were close - I would sell you the newer Baldwin really cheap. I no longer play much as it is harder since my stroke.