so I have an HTTP endpoint which gets maybe 10 hits per day, and does some lightweight computations and records small amount of data.

Right now, this is done on AWS, with lambda + S3, and costs under $0.02/month.

Can you point me to something more cost effective that that? Don't forget I also need backup for data, automatic failover in case of machine failure or crash, amd no maintenance (like OS upgrades) for 5+ years.