If you take everything someone has - for example Marion, every penny she had and her home, and it looks like that is what he was aiming for with JO and GM - what is the person meant to do, they go to the police and family, he would have left his victims with no other option ( they have no house or money)- I think he has more victims that he silenced TBH, he doesn't seem to have the ability just to take some money and move on and have the person and police chalk it up to bad luck and a minor offence, he seems to want it all.
Unless Marion was the only person he got away with his full plan, the others all cottoned on at some stage and he only got a portion of what he was aiming for ?
I don't know just thinking out loud lol