@CPHB2021, yes, one large house. Multiple storeys, and each family 'unit' has its own bit/floor(s). Same building but separate kitchen, bathrooms, living space.
Two of the adults (DH and one of the older relatives) wanted a big farm house-style property with lots of land and multiple houses/cottages. Or one where we could build an annexe or little cottage.
I really didn't want this, and it was my deal-breaker. I didn't want to be rural and isolated and have to drive everywhere, even for a pint of milk. And I wanted to walk the kids to school.
Also, while I wanted a big garden, I was worried about having too much land that we couldn't manage. The older relatives said they would sort the garden/land as they enjoy it, which is great, but I did bluntly say that wouldn't always be possible as they got older.
I'm very much the driving force of things or 'doer' in my family (as in, amongst those who moved in together), and I knew they all loved to talk about these ideas but in reality I'd be the one ending up sorting it.
They accepted this and were all happy with the town idea. And then we found the perfect place.