Start at GE and let it buy any supplies it needs, it will use normal hammer (crystal saw is not supported). If you would like to skip the GE phase entirely, make sure the script has 10+ teleport to house, a few ring of dueling(8), hammer (normal hammer), saw and required planks in bank. If bell-pull or beds are not built, it will also need rope, oak planks, bolts of cloth, and camelot/ardougne teleport to hire a servant
Also the script will use the servant to fetch planks from bank, not unnote them from inventory, so it will leave planks in bank