I just want to let you know that I owned a small server before, and I am currently staff on a nice sized network. So I have experience in server related things.
Incoming rant, as I am taking what you said seriously and disregarding your feelings. ;P
I logged in, was met by bright green and dark blue, and was not very amused. The random green and blue is not very good looking for a floating island spawn. You have all these neat rustic/medieval colors, and then BOOM. Green and blue in my face.
Gross. If anything, change that color scheme, you do not want people leaving because of that.
I see you have gamemodes. Skyblock, Vanilla, Creative Plots, Factions, and Build.
Boooring. I see all these gamemodes on bigger and better servers. And although lots of players like playing these gamemodes, you need something unique, or you will lose all these players to servers who have a better version of these gamemodes.
Ooooo minigames. Parkour, Spleef, Kit PVP, Mob Arena, Survival games.
Once again, "nothing new here, just another copy of a larger network." ... You do not want players thinking like that. Get some new minigames. Bukkit is full of fun and out of the way minigames that you have to click through 50 pages to find.
You need to give a reason for players to stay on your network. Right now, there are 0 reasons that I can think of.
In order to even start a server, you need to have every last detail planned out. You need a reliable advertising plan, and you need to think about what can make you unique. When I started my server, I was no better than you are now. But I was able to get it to a point where my little server supported at least 40 people on all day everyday. And I did not have a network.
Unless you are a minecraft server expert with a ton of good connections and a large wallet, it is a very very bad idea to start a network right off.
Take some advice, start small, and build up. It could take a while, but if you start big and expect things to go great right off, you are dead wrong. 80% of the time you will fail. But that is how you learn, by failing. I failed so much during the first three months of my server it was not even funny. I didn't plan anything before I started my server, so I had it really really rough. But I gradually got the hang of things, and finally ironed it all out.
Creating a thriving and happy Minecraft community takes time,and a huge amount of work. It is not something you can do by buying a few dedicated servers, slapping a few worlds and plugins together, and saying: "hey join my new network that will amaze you!" (unless you are some huge youtube celeb *u*)
Take a step back. Look at your network, and start thinking about what you can do to make it worthwhile for a player like me. You have a lot of potential, you just need to point it in the right direction.
(rant is over, I hope I didn't seem like a horrible ogre ;P)