Look at serverbuilds.net to learn how to find the right hardware to buy to host your selfhosted apps. Look into some VM hosting Hypervisor. I am using VMware b

Look at serverbuilds.net to learn how to find the right hardware to buy to host your selfhosted apps. Look into some VM hosting Hypervisor. I am using VMware because that is what all my jobs have been using. You can use ESXi for free. You could also look into something like proxmox. If you buy and build right, you could have enough CPU bandwidth and memory to all that you would want. Put all your VMs on SSDs, multiple VMs sharing a single HDD could be considered a war crime. Learn docker and docker-compose. Use https://www.composerize.com/ https://www.composerize.com/ to help in the transition from docker to docker-compose. Have a look at linuxserver.io for already built docker images for most of what you want to do. Keep an eye on Humble Bundle for a DevOps or networking/sysadmin book collection. If you want to roll your own firewall and router, look into pfSense. It takes a while to learn and understand, but it is worth it.