2nd E boxxed realms set came with a premade adventure called shadow dale. one of the 0 lvl npcs in town is walking around with a magical belt, you have a guy who detects magic, that 0 lvl commoner is as good as dead. Guess what its a belt of stone giant strength.
From there a well played group can and will aquire a **** load of adamantine, and an entire group of freed from slavery dwarven smiths who with any kind of diplomancy will happily reward their saviors with entire gear kits of the stuff. Even my guys tent spikes where made of addy after that. Not to mention your now have a great underground base of operations to buff up and encourage the dwarves to maintain and defend, bring down some human allies from the dales, and boom time to start a under dark adventure making war upon the drow.
This all from a lvl 1-3 premade adventure to get you started in the realms.