So you need to " scale " from 1 person to a household and take into account that all information you put in there, financials, recipes, addresses, etc. etc.. need to be ubersimple, working on a phone, auto sync etc... and need to continue working even when something would happens to yourself.
So that is why i standardized the knowledge management system in our household on OneNote (2016 client for the laptop).
This is because everyone understands office.
The API both the COM and the graph API also lets you create , update, read, etc... so you can write basically everything you can think of e.g. auto put bank transaction on the correct place in the correct table in the correct place in the taxonomy.
Thinking about the structure of a family and everything in there is also interesting and I had some larger revisions on that.
See also: https://github.com/projectje/OneNoteExporterAkaPublisher