Everything about this screams "skid".
It's a neat idea, but seriously not a good idea to pull this off without mods. It doesn't matter how much ram you have, players moving 120 blocks every few hundred ticks will LAG your server. It'll eat your CPU to the bone. Even with a quad core CPU, all those blocks moving would only be happening on a few threads (at most) at once, which will kill your server TPS. Plus, you'd need to grab the source from Factions, and re-write how chunks are claimed (since factions would constantly be moving). Another negative thing I'd like to point out; you came here looking for comments and input, but as soon as someone brings up a flaw, you shoot it down. Don't come on PMC, asking for criticism, if you won't accept the negative inputs. I think the majority of us would like to see your idea. But my opinion is that you're doing it wrong. Start learning how to code server mods, or find someone who can, if you can't (Bukkit coding, and MC mod coding are two entirely different ballgames, fyi). and for the record, all plugins are custom. (oh and dont claim to have "custom" plugins when you're probably using TerrainControl, CrackShot, MoveCraft, Factions, etc etc. Be straight up about what you run on your server.)
