A non-EcoBoost Fusion is decent enough. That's the 2.5L, 2.0 and 1.5 are EcoBoost turbos. I'm not sure I would drive a used Fusion like that, I'd spend a little more and get a Camry or an Accord if she drives that much.

We needed something in her price range and her size to fit her things in, it’s gonna be hard to talk her out of it.

I'm in my second Fusion. I had the 2013 Fusion with the 2.5L.  Went over 120,000 then traded it in on a 2017 Fusion with the 2.0T. I prefer the 2.0T because of the power. I do a lot of highway driving and needed the extra umph the Turbo has. That said, the 2017 Fusion with the 2.0T had an engine issue that caused coolant to leak into the crankcase. The Ford Dealer replaced the long block at 42K miles free of charge. I used to drive Acura TL's before the Fusion and I can say the Fusion ride is much better and quieter than the TL's. I think your wife will be happy with the Fusion. Do you know what size engine it has?  The 2.5 non-Turbo was fine for around town but it is underpowered.