Oh my...I was in your shoes 2 1/2 years ago.

DS was diagnosed with FPIES at 10 weeks old--and there was a huge list of foods we were told to avoid until he turned 1. At 1, there was additional RAST testing and food challenges done, so our list was then cut down to soy (including oil/lecithin) for FPIES and is anaphylactic to eggs, milk, peanuts and tree nuts.
Even with DS now, at 3 1/2, he eats the basics. Fresh meat, fresh veggies/fruits. We make all breads, crackers, muffins, cookies from scratch. You will have to be careful with ELF (Enjoy Life Foods) products, because even though they are "Top 8 Free," some of them contain rice. You will have to watch for rice with the coconut products, too. We are HUGE users of So Delicious coconut products (yogurt, ice cream, milk), but be careful of the rice. Rice starch is in lots of products.
My son was breastfed until 1, then a Neocate baby, too. About 16 months old, we switched him to EO28 Splash which is also made by Neocate. It comes in cases of 27 individual "juice box" type boxes, already mixed. We LOVED the ease of this!!!

Our DS drank two boxes/day until he turned 2 for his nutritional needs. Our insurance did not pay for his formula, but if yours pays for Neocate, it will most likely pay for the Splash, too. This is an option if he doesn't like the Neocate. The Splash comes in 3 different flavors. If you contact Neocate and ask for a sample pack of Splash, they will send you a 6 pack that includes 2 of each of the 3 flavors to trial.
I will add more soon. I have a meeting at work.
