We also moved off of Heroku, but instead of a home server, we moved to Hetzner (https://hetzner.com/ https://hetzner.com/) and threw Dokku on top. Significantly

We also moved off of Heroku, but instead of a home server, we moved to Hetzner (https://hetzner.com/ https://hetzner.com/) and threw Dokku on top. Significantly cheaper than Digital Ocean (ridiculously cheaper than Heroku) and has a good reputation on HN. We opted for their VPS's in Ashburn, Virginia, but you can get dedicated servers in Europe as well. Depends where your customers are. You can do this a lot quicker and more reliably than trying to run your own servers from home.