The reason why Hypixel and all those other servers you mentioned, have so many people everyday. Is because they're really good servers. None of them got their player base overnight (excluding Hypixel, since he already had a big fan base that were just waiting for a server to be made). If you're server is really good, has amazing stuff, looks nice, has a lot of quality. Then there's no reason why it would ever be lost in the millions of other servers, especially if those millions of servers are general ones with minimal stuff and plugins.
Think of it like Youtube, not a single youtuber expects to get where they are now. I didn't even think I'd get to 5 subs on PMC, but here I am. And that's a big number for me, considering that what I made so far is of really poor quality.
And remember that all those famous servers have their own websites, with a store, forums, FAQ page, contact details, and other stuff. And those websites are also of amazing quality.
I'd suggest - if you have the funds to make a 24/7 server - to hire incredible builders, redstoners, ect. Make it the best server it could ever be, and just wait for the word to spread, or for people to discover your server bit by bit. And if you have enough money, and the server is good enough for a lot of people to stay, advertise it on famous websites like this one.
P.S. You're making the numbers WAY smaller than they would actually be. And what I've understood from your calculations, is that you think that if someone has a server, or plays a server. They will never ever play on another server in their life.