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.