My ideia for build cost and tools

Destruction tools and number of hits

Level 1 (wood) - Rock - 120, stone hatchet - 80, hatchet - 60, picaxe - 30, 1x grenade, 1x c4
Level 2 (wood) - Stone hatchet - 160 , hatchet - 120, picaxe - 60, 2x grenade, 1x c4
Level 3 (stone) - hatchet - 240, picaxe - 120, 4x grenade, 1x c4
Level 4 (stone) - Picaxe - 240, 6x grenade, 1x c4
Level 5 (metal) - 12x grenade, 2x c4
Level 6 (metal) - 24x grenade, 4x c4

Build cost

Frame - 5 wood

                     hit | cost          Total

Level 1 (wood) - 4 | 5 wood = 20
Level 2 (wood) - 6 | 10 wood = 60
Level 3 (stone) - 8 | 10 stone = 80
Level 4 (stone) - 10 | 10 stone = 100
Level 5 (metal) - 15 | 5 metal = 75
Level 6 (metal) - 20 | 8 metal = 160

We don’t know yet if grenades or C4 will be added to the experimental version yet. And for the building costs those will all change anyways. The current settings are in only as placeholders.