you dont need steal anythink.. you can buy stuff craft and sell it.. you can sneak around and gather tons of loot and stuff..
you can put all your gold into 1 char and only 1 coin into a bag and this bag needs to be on the second char.
so one char has a bag with 1 coin in it and the other char hase all the gold normaly lying around in the inventory
now you sell (with the char who hase all the gold) items to the vendor .. so that the vendor hase no gold left.. then switch to the char who hase 1 coin in a bag and you give the vendor the bag for free.. now press ok give him the bag with the coin for free... now you can select all items you want plus the bag with the coin. click on gold so it makes the same value ... and after the trade goes trough the gold you would give the vendor lands all in your bag wich you purchaised bag from him.. split the gold from the bag and give it back to your other char and now you can buy whatever you want in this game..
divinity developers had always and gold trick in every their games. even back in divine divinity you could duplicate items and gold.. DOS 1 i explaint it.. also in DOS 2 their is a similair gold doubling trick. but it oes not work like DOS 1.. it would take to long to explain just google or youtube it.