I run pgautofailover with 2 replicas and 1 monitor, you can run 2 replicas on equal configuration, though i size primary bigger and monitor node is tiny.

You can run this on $10x2 = $20 per month setup for 2 replicas and 1 monitor node for maybe $2-3.

For most other projects i just use sqlite, backup periodically to s3.

some report (coincidentally i was checking health of my small cluster for an app)

Common application queries average under 4 ms:frequent analytics queries: ~0.9–1.4 ms average common inserts: ~0.4–3.4 ms average the slower recurring reporting query: 62 ms average across 53 calls, 308 ms worst case

Query volume is approximately 2.30 million SQL statements/day (~26.6 statements/sec), based on pg_stat_statements over the last 97.3 days. That includes every SQL statement, not just user-facing requests: BEGIN/COMMIT alone account for ~1.05M/day, analytics inserts for ~522K/day, and HA/monitoring checks for ~118K/day.