First off, i am planning on buying this server, it has everything I need exept that it doesn't mention if it comes with nic cards,idrac ports or raid cards but from looking at the reviews, i see no complaints about that.

My plans are to run multiple vms using proxmox so I can start learning different networking setups(proxy,vpn,firewall,dns,dhcp,ect), web hosting, and most importantly, I want to host multiple minecraft servers. One personal for me and friends, and 3-4 open to be rented by public users.

Has anyone had any luck hosting their servers but having them be able to be managed and controlled by a web gui(like alternos or other paid services) by the person paying me to host their server?

Before anyone says anything about security, I am already learning to implement a reverse proxy, learning the different firewall rules, and looking into getting domain names to help hide my public ip but I would love any suggestions on making it more secure.