The photography world has changed quite a lot since the Minolta days.
To answer your question directly, I’d recommend getting a used Sony a7 of whichever generation you like the price of.
That being said, if we dig a bit deeper, kids are some of the most challenging subjects, and family gathering some of the most challenging events: fast movement requiring fast focusing, low light requiring wide apertures, high ISO or flash.
I’d consider switching entirely to a modern system that can get you those features.
Or “How Signal is closer in functionality to WhatsApp by the day, because it turns out people like the functionality of WhatsApp.”