Regenerate Unused Chunks Automatically

I want to run a Factions server with a limited in size world, but since that would need regular wiping(since resources are limited), I'd wish to see a plugin that regenerates a chunk not *edited* by player in a number of days.

Like, per say, a player makes a base - it gets raided and destroyed, the player moves away, and the chunk with the old base is regenerated(so there's ore there again, and no sight of base)