GNR is definitely not family friendly. Good call.
The Simpsons Pinball Party is a good choice. It’s family friendly, has lots to do, and is reliable in general. I can see wanting to get a warranty. You can see what they’ve gone for in the Pinside Market Archive, but I’d say around $5000 for a Home Use Only (HUO) one.
If the machine is in beautiful shape, they deliver and set it up and give a decent warranty you’re probably not far off with value.
Guardians is a blast for a good player but it’s really tough. Spider-Man is a great pin.