My son loved having a fish tank in his room. You know, one with a filter, so there was a soft, constant humming in the background. We started sleep traing about 5 months or so. He still got up once a night for mommy-food (ie. breast feeding) but we found that he slept longer when he had breast milk in a bottle from daddy. Personally, I think Ferber method is a little cruel. Maybe try a modified version. that's what we did. Let him cry for 10 minutes, send daddy in to re-tuck in. Let cry for 15 minutes. Repeat and always increase wait time by 5 minutes. Make sure you watch the clock, because if you go by what the time "Feels" like, you'll go in wwaaaaaaaayyyyyy toooo early. I know you hate hearing him cry, but this really worked for us. Oour son would still get up for a 4 or 5 am little bottle, but it was only a few ounces maybe 5. He too is a bbbiiiggg boy who gets hungry, even in the middle of the night. Eventually he'll grow out of it. Our son was putting himself to sleep by 7/8 months and sleeping all through the night by 10/11. He now sleeps 14 hours a night!!!
I hope this helps you. If you would like to talk about it, just send me a message. I know this all probably sounded a little confusing, but I can break it down to be wicked simple for you. A friend of mine told me what to do and it worked like a charm.