This would be a lot harder if you have a spouse and want to track your family finances. It would require both people working together to keep it up to date, and finding that time is tough with kids.
For all the concerns and problems over tools like Mint, having all 10-20 accounts we have automatically sync their data into the system makes it so much easier to manage.
We don't find it hard. We sit down one or two times during the week in the evening and I enter all our transactions into KMyMoney. It takes 5-10 minutes to do once you get the hang of it. This is across 5-10 accounts. You might have a little more work to do with 10-20 accounts.
On Paisa (ledger). I like it! But...KMyMoney has such a nice interface for recurring/future payments and reports (that I can edit to suit our needs) that I'm struggling to see the point of ledger behind gui for our use case. It does look nice though.
For all the concerns and problems over tools like Mint, having all 10-20 accounts we have automatically sync their data into the system makes it so much easier to manage.