Sure, this is doable. I'll start work on this right away.
If you're talking about a free server, then sadly you most likely can't upload custom plugins. They have to approve public ones too, so you...
Would you like the minecart to be invincible so players can't break it?
Hey! The link to the sit plugin doesn't work. Could you edit the post and put in the link?
Sadly, that's impossible. There's no way to start a sound in the middle of it unless you have hundreds of sound files, each with a second more cut...
Yeah, I could do that! I'm working on it now.
Separate names with a comma.