Other than buildings, It might be a good idea to have a list of buildings, what they give on expeditions.
I'll list what I know, and with some help, it should be completed easily. The following information are for buildings at MAX level. At lower than max level, assume decrease in quantity (aka, maybe 1 instead of 3) or quality (maybe 1* instead of 4*)
1) Gold mine
Cost 5000 gold
Reward 50000 gold
Remarks: Net Profit 45000 gold at max level.
2) Worker's hut
Cost 3000 gold
Reward 8 Silver Smithing Hammers
Remarks: Useful in early game when you need to power-level your equipment
3) Armorsmith
Cost 3000 gold
Reward 3 Dragon Hide
Remarks: leather, hide, etc. Useful for armor crafting.
4) Alchemy Lab
Cost ???
Reward ???
Remarks: ???
5) Farm
Cost ???
Reward 3 Flowers
Remarks: Good if you are into crafting consummables, I guess... Personally though, I'd rather spend gold in the marketplace and buy the consummables instead...
6) Iron Quarry
Cost 3000 gold
Reward 3 Silver Ores
Remarks: Basically, more materials for equipment forging/smithing.
7) Marketplace
Cost 3000 gold
Reward 4 Major Healing potions
Remarks: What's not to like about healing pots?
8) Salvage Yard
Cost ???
Reward 2*-4* all material ticket
Remarks: Anyone can confirm its effects?
9) Wishing Well
Cost 9000 gold
Reward 9 Express Ticket
Remarks: For all its usefulness, the expedition reward is fairly meh. For the working class, express tix are useful cause we can't play during work, but for others, its kind of useless...
10) Merc Camp
Cost ???
Reward Hero Ticket
Remarks: Having an additional hero ticket is pretty useful. Can anyone confirm the maximum ticket available?
11) Fusion Alter
Cost 3000 gold
Reward 12 Gold bars
Remarks: Similar to gold mine, but you need an additional step: Selling the gold bars for 60,000 gold.
12) Weapon Forge
Cost 5000
Reward 2*-4* 2 handed weapon
Remarks: Not so useful imo. Of course, if you save up to 5 of those 4* weapons, you can forge them into a random 5* weapon...
13) Strike Tower
Cost 5000
Reward 3 Major Atk Up Root
Remarks: Consummables are really useful in PvE and events.
14) Shield Tower
Cost 5000
Reward 3 Major Def up Eggs
Remarks: Consummables are really useful in PvE and events.
15) Academy
Cost 50000 gold
Reward 2 Job Quest Keys
Remarks: Pretty much one of the very few ways you can get job quest keys. Though, its still very expensive...
16) Training Camp
Cost ???
Reward ???
Remarks: ???
17) Watermill
Cost 3000 gold
Reward 30 Energy
Remarks: Basically, buying energy with gold. Still, the rate is not bad.
18) Mystic Tower
Cost ???
Reward Major Mag up Mushroom
Remarks: Consummables are really useful in PvE and events.
19) Gem Cavern
Cost 100000 gold
Reward 10gems
Remarks: If you really need that 10 gems...
Would appreciate PMs or posts to help me complete this. Thanks in advance!!!