There are 30 days to upkeep and there are also 30 days to farm that upkeep. The thinking of how to do all the upkeep on day 1 by needing so many chests or x number of hours at GE seems to be missing the point of how the game is meant to be played. Having played on Plus the last few months with 100% decay, I feel 50% isn't enough and will be too easy. Last wipe had upkeep of 80K stone and 8K metal a day on main base. Also had a full HQ 7 story heli tower. This is playing as a duo, not in a large team. Upkeep isn't that hard with a bit of automation to feed the TC and means have to do more than just build then rinse and repeat monuments after day 1. It is called Pure which is meant to be a realistic mostly unmodified version of the game. PVP has decay, so having decay will make it more Pure.