Renting a server means you have a much easier time dealing with the admin side of things (Normaly there's an AP or GUI that even a boomer zoomer could handle). It's not hard to admin your own Dedicated server manually, but if you have absolutely no networking experience at all, then the path is much more tedious so for total newbies, renting a server for a couple bucks is usually the better option. You also won't have to unmask your public IP. (Or go through steps to set up a DNS domain to avoid doing so)