What a wonderfully insightful discussion - I’d like to recommend the three of you for “poster example on how to conduct a respectful and interesting community discussion” (this might sound sarcastic written down, but please know that I intent this with nothing but sincere appreciation).
Agreed, @Leandro_Zubrezki is creating a Quickbooks pack to integrate Quickbooks with Coda.
As to your concerns regarding table size, @Kevin_Donath, the prolific Coda-builder @Connor_McCormick1 is working on an Archive-pack allowing one to use a third-party service as an external storage. He’s currently looking for beta-testers: Archive Pack Beta Testers!
These are the two community developments that came to mind when reading this read, will add more if more come up for me.
All the best from Austria,
Nina