Edit: Rewrote my entire comment... The delay on the app side should only be 15-30 minutes. Use a replication database (much like the Postgres follower system o

Edit: Rewrote my entire comment... The delay on the app side should only be 15-30 minutes. Use a replication database (much like the Postgres follower system on Heroku) to ensure no loss of data and you should be fine.