I own a server but I know what I'm doing, I'm 18, and my Admins are also around my age, as I don't like kid admins. Kids tend to abuse commands and make other players quit.
I'd make a massive, massive, massive, collection of servers. I'd have the best gaming computer I could get. I'd run a minecraft server with at least 1TB of RAM. I'd buy PMC and put my server over everyone else's.
"So since I am now new server owner I can post it, right?" Correct, you may post it.
"And there will be only one server listing, as I am aware you can post 2 servers on 2 accounts?" Not sure what you mean by this, you're only allowed one account on PMC, and one server submission at any given time.
I'd recommend waiting for a Moderator to answer as I don't visit this website frequently enough to know the rules well.