Sounds cool! and the PvP server you were talking about could be like the gladiator arena but you cant pick weapons up and each kill gives you 1 coin.and the costs would be different on shields,weapons,and armour.for example:
sword 5 coins
spear 10 coins
pike 20 coins
helmet 15 coins
bow 10 coins
kinda like that but these don't have to be the cost for the things.