That's easy, brah. Installing plugins is as easy as drag and drop.
When you say Admin, you should mean someone experienced with plugins, knowing what you'd need prior to starting and knowing how to manage your community.
Not to mention install and optimize your SQL, that's important once you get over, say, ten people online at once.
You're missing some important information. Such as: How many players frequent your server, what kind of connection they're used to, what else other than Towny you'd like on there.
Bettercraft offers all of this, believe it or not.
We have a fully functional Creative area, accessible through a few commands.
In the main world, where it is survival based, everyone gets a limited number of chest protections with which to hide their most precious of materials.
There are no kill limits, you don't need a reason. You just sit and wait for someone to be vulnerable, and then you kill them.