So now you're throwing a ton more money at something, costing you in purchasing the bare metal, but also the cost to maintain it. If you want to build compariable redundancy as you get with EC2 it will cost you. It wont be cheaper.
I have no idea what you think the costs of this is. I have managed setups like that. Every year we priced out what a cost to EC2 would cost us, and every year it was about 3x the cost of running our own, with my time - accounted for to the hour - of running the system added in. Every year we also priced out Hetzner and a few other options. After a years Hetzner eventually won out (colo space in Germany was cheaper than where we were in London). So we tied Hetzner servers into our private cloud layer, and migrated containers and shut down servers as it fit into our schedule. Not having to physically go to the colo's to swap drives now and again saved me an average of maybe 2 days a month to deal with several racks worth of hardware.
> Every year we priced out what a cost to EC2 would cost us, and every year it was about 3x the cost of running our own
> we tied Hetzner servers into our private cloud layer, and migrated containers and shut down servers as it fit
Building your own services on top of AWS is always going to come out more expensive. EC2 + EBS volumes alone are going to be more expensive than going with hetzner (particularly if you're not looking at reserved instances, and not utilising spot for burst). You mentioned that you are building your own private cloud layer and migrated containers; the cost of building that out in the first place is likely enormous compared to building and running on top of fargate.
The cost of building out our private setup was my time for about a month.
At the time we didn't have a choice, as nothing like Fargate existed, but today it's also easier to do setups like the one we did.
It mostly involved rsyncing base images over, rsync and a super simple storage service for backups, a LDAP based directory service, and and a thin layer over vzctl (first) and docker when that became an option, coupled with a VPN setup to tie our locations together, and a reverse proxy setup that did dynamic lookups in our private DNS fed from LDAP.
It is hard to do as a multitenant public service, it's trivially easy to do as an internal tool that needs to support only exactly what you need.
I've built out setups like this for a number of clients since, and it's typically 1-3 months of work to automate pretty much everything depending on complexity, and so it pays for itself quickly from a very low scale.
The first company I did this at wouldn't have been profitable at all if we'd relied on AWS
