[BUILD COST/UPKEEP LISTED BELOW]
This base is focused towards duo/trio teams, although a dedicated solo player could get this down in a day or so.
Expansion upwards is up to the individual player. You can add another floor with loot rooms or add a shooting floor.
Adding an extra floor for more loot rooms will up the upkeep cost by roughly 2,000 stone, 1,300 metal, and 3-5 HQM depending on deployables.
Build cost
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Wood: 6,066
Stone: 26,160
Metal: 4,800
HQM: 233
Upkeep cost
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Wood: 3
Stone: 4,631
Metal: 1,664
HQM: 42