Gosh I hate it when I get the urge to create something. This time I ended up making a builder suggestion...again.
Anycase, lets get underway, since it does look like a promising concept.
I present to you, the Gnolam Builder:
(You might notice that there are no upgrades. Well I havent gotten to that point yet, even if they would need any upgrades. I wanted to keep the builder as simple as possible).
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Lore: Master of Trade, the Gnolam found little need for a welltrained workerforce. They still retain a small part of it to get the trading started.

Gnolam Builder
Hit Points: 300
Armor: 4 Medium Armor
Damage: 125-125
Abilities:
- Master of Trade:
Increases the yield by items bought at Trading Markets, Trading Centers and Financial Trading Centers and then sold to 150% (Standard selling value is 50%).
- Blinding Powder:
Slows the movement and attack speed of a target by 25% respectively for 4 seconds.
- Harvest Gold:
Harvests gold from an existing gold mound.
- Repair (Builder):
Repairs a mechanical unit or a structure.
Gnolam Units
To the left, The Gnolam Rogue.
Hit points: 575.
Armor: 10
Damage: 140 Heroic
Size: 1x1
Cost: 400 Lumber
Abilities:
- Hidden Dagger:
20% to deal twice the damage on an attack.
-Blinding Powder:
Slows the movement and attack speed of a target by 25% respectively for 4 seconds.
- Harvest Gold:
Harvests gold from an existing gold mound.
- Repair (Builder):
Repairs a mechanical unit or a structure. Repairs at only 50% the rate of the builder.To the right, the Gnolam Worker:

Hit points: 50.
Armor: 0 Heavy
Size: 1x1
Food Cost: 15 (Maximum of 10 workers)
Ability:
- Magic Resistance
Reduces Magical Damage taken by 50%.
- Detonate
Detonates the worker, killing it.
(The Workers cannot be upgraded at all, neither in lumbering or hp).Buildings:
Shelter:Hit Points: 200
Armor: 0 Fortified
Cost: 10 Lumber
Size: 2x2
Ability: Produce workers
Food Sources & Walls
Walls:Hit Points: 500
Armor: 15 Fortified
Size: 2x2.
Upgradable: No
Cost: 150 Lumber
Requirement: Shelter
Food Source:Hit Points: 300
Armor: 0 Heavy
Size: 3x3
Attack: 20 Pierce
Cost: 20 Lumber
Trading Markets, Trading Centers and Financial Centers:Hit Points: 375
Armor: 0 Heavy
Size: 3x3
Requirement: Shelter
Trading MarketLumber Cost: 150 Lumber
Items sold:
Level 1 Goods:
- Necklace (300 Lumber)
Trading CenterLumber Cost: 750 Lumber
Items sold:
Level 1 and Level 2 Goods:
- Necklace (300 Lumber)
- Emerald Ring (500 Lumber)
Financial Trading CenterLumber Cost: 1500 Lumber
Items sold:
Level 2 and Level 3 Goods:
- Emerald Ring (500 Lumber)
- Dark Sphere (750 Lumber)
Tower Foundations

Tower Foundation:
Hit points: 300
Armor: 0 Heavy
Size: 2x2
Attack: None
Lumber Cost: 35
Food Cost: 1
Upgrades into:
Grinding Bunker Tower:Hit Points: 300/450/600
Armor: 0 Heavy
Size: 2x2
Attack: 30/45/60 Pierce
Attack Range: 500/550/600
Lumber Cost: 100/250/500
Bunker Tower:Hit Points: 300/450/600
Armor: 0 Heavy
Size: 2x2
Attack: 25/35/45 Pierce
Attack Range: 700/800/900
Lumber Cost: 100/250/500
Poundic Bunker Tower:Hit Points: 300/450/600
Armor: 0 Heavy
Size: 2x2
Attack: 10/20/30 Pierce
Attack Range: 850/1000/1200
Lumber Cost: 100/250/500
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Thanks for reading, and I hope you like it. Like usual, keep in mind that the values you see here are only theoretical to give you the idea on how it works.
I also went through the trouble making a template map for the Gnolam Builder.
To me, a suggestion just isnt complete until you make a template so people can experience the builder as well.
Up to 3 people can play at once, enjoy. =)
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http://www.xup.in/dl,10106025/Gnolam_Builder_1.1.w3x/1.1 Version released. See changes under importnant changes.000====================000
Fixed Attack speed on towers, and the replaying music.
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http://www.xup.in/dl,22099012/Gnolam_Builder_1.2.w3x/Version 1.2000====================000
http://www.xup.in/dl,11700166/Gnolam_Builder_1.3.w3x/Version 1.3. See details under Importnant changes. 000====================000
The Gnolam can be very powerful in the arts of trading, but rebuilding lost Markets can be costly. Keep that in mind, they're not overpowered in the trading.
IMPORTNANT CHANGES:1.1-The Hunter golding system was removed, the builder now harvests like anyone else.
- Item trading system reworked:
Its now based on items that are used the instant you buy them, saving you from the buy and then selling gamebreaking hassle.
I also added stocks which are notified on each item for sale. This generally means you can now go back to the markets every now and then and purchase up everything, then wait again.
1.2- Added hotkeys and terrain changes to the Trade Items at the markets.
1.3- Added Golding ability to both Hunter and Builder.
- Added Repair (50%) to Hunter.
- Workers have a new model.