Automatically collect all expenses on recurring invoice

Automatically collect all expenses on recurring invoice: As discussed on the forum: a feature to collect existing expenses and add them to an invoice would be great. Here's the use case I see which I am currently using on my old invoicing software. I have different systems where billable things happen, Kimai timer for Support, VoIP Calls, SMS etc. I collect all this data via API and send them to my invoicing software in a "queue". All recurring billable items like subscriptions will also generate such a queue entry. Every client is then billed monthly which collects all queue...