Breastfeeding and Peanut Allergies

I am trying to make a decision or not whether to breastfeed my second child due in March. With my first, I ate everything under the sun during pregnancy and breastfeeding for 11 months. Anyhow, I thought breastfeeding was supposed to help with allergies. Not. DS is PA and has 7 other pretty bad (dairy, egg, etc.) food allergies. His allergist recommends breastfeeding the new baby and not eating peanuts while pregnant or breastfeeding. Or, giving the new baby hypoallergenic formula as a last resort. For me, nursing is a huge effort. I couldn't pump and my first DS ate every couple of hours. At about 5 months, my DS was covered from head to toe in a deep red rash. He nursed even more because he was so uncomfortable. Our general doctor, told us to put hydrocortisone on it and lotion. By 11 months, he had hives from my DS touching him after eating peanuts and we finally asked for a referral to the allergist. Then, we found out about all of his allergies and we switched him to soy. I don't want to make the same mistakes twice. Right now, I am at the point where I will try and breastfeed (sans peanuts, that is really easy in this house as my joke is the only nut that walks through my front door is my MIL) but eliminating the 7 others would be impossible. Besides, the allergist says if I eliminate those, there is no saying that the new baby won't be allergic to something else. The bottom line is, if this one so much as gets a mark on him that looks like a rash or sneezes at me funny, it's hypoallergic/home equity line formula for him!! Anyone had this situation? Thoughts? Advice?