Storing SQLite database and other static data in an S3 bucket

A lot of setups I come across that utilize AWS are struggling with the question of where to put the sqlite database and other contents of the /data/ directory. EBS volumes are AZ-specific, makes it hard to make grafana a HA resource. RDS is way too expensive for what needs to be stored.

How much of a development effort would it take to let contents of /data/ be stored in an S3 bucket?

Can you mount a file from S3? And how well would that work?