100%
Finally managed to do it without losing a hero or a building.
I kept my initial buildings spread out with the hope that peasant houses would be built between my guilds and my castle.
Fighter's guild West, Healer's guild East, Marketplace south and then a Rogue's guild South East. I left all the initial lairs alone and stuck an explore flag near the south trading post. when that's visible, i built a trading post which cleared the fog around the south ogre lair. Then cleared out the other lairs while building another Fighter's guild North West and then another Healer's Guild North East. Only had to deal with 2 ogres. Cleared out the local lairs while getting lvl 1 blacksmith trained in swords, heavy and leather armor. Mage guild between the two Healing guilds which paid off as friendly healers would always be around when the mages fought rats. Explored north west for the trading post while going for dwarves. Stuck down a trading post and an alchemist (good for gold, didn't actually purchase anything for it!). Then consolidated my trading posts with dwarven towers and stuck down guardhouses at good intervals for my taxmen.
It was pretty easy from there out.