Ok, Scratch my last post, After talking to Brad, I'm going to cut Magic Logs to 95 and make around 25m, then... ... Go and do something else, maybe runecrafting!
If you want to get serious about making cash, then I have a suggestion. When I was saving up for bandos this is what I did: I farmed toadflax and killed green dragons. I made 250-300k an hour!