Offering individual perks as donation incentives would be great. Basically I think it would be non-game breaking and somewhat beneficial to offer additional player vault incentives in the donation shop. they would function like the /fly command incentive where one purchase is all you need, but the ability to upgrade to more PVs until you reach a cap would be great as well. you could offer singles or packages of vaults for various amounts. This would help with the redundancy of having to warp to your base as often while out mining or gathering resources, especially with McMMO's double drops perk.