Crates should last longer than anything else. They should require the least to upkeep. One board should repair 20 hits or so and a given crate should sustain 100 hits at least.
When it's all said and done the purpose of decay is to eliminate inactive territories. Not make people run around with fucking shitton of extra clicks. The extra clicks should be minimal and decay/repair overall should be shifted toward decay hits>items to repair to a significant ratio that is at least 1:5 and 1:15 for buildings/walls and 1:20 for mansions, crates and brick walls.
The reason being is that crates should survive everything else on a claim so that after a given claim has decayed form inactivity and a month or two later when the guy decides to start playing again and log back in to make the most of what's left on his claim...
He should stil be able ot check his fucking mailbox. E.g. crate.
Someone inform me if I'm wrong about the philosophy behind repair & upkeep.