Upkeep depends on the number and grade of building pieces inside the tool cupboard range. Save the base once, then enter the number of offline days you need to cover.
Count building pieces
Use full building-block equivalents. Doors, deployables, and loose resources are not part of this profile.
Keep grades separate
Stone, sheet metal, and armored pieces draw different resources, so combining them into one total hides the real cupboard requirement.
Leave a buffer
The result is a planning estimate. Add room for upgrades, repairs, and any pieces placed after the profile was saved.