My son Kayden to be able to visit a specialist

I am raising money for my son Kayden to be able to visit a integrated medicine specialist to receive help for chronic Lyme, alpha gal, MCAS, and celiacs. Kayden was born sick due to me not being correctly diagnosed with Lyme disease prior to his birth. He is now 12 years old, and has became increasingly sick over the years. In January 2020 he nearly died from Covid. He was sick for two months, although he recovered he is still not doing well. He is currently allergic to all meet, chicken, dairy, eggs, shellfish, soy, nuts, nightshade, vegetables, citrus, fruits, berries, bananas, avocados, peppers, onions, pineapples, coconut, canola, etc. There are only a few foods that he can eat, and even then he often has allergic reactions to the “safe foods”. He struggles with depression and anger due to his medical condition. I have taken him from multiple doctors and allergy specialist who have been unable to give me any answers. I recently found a doctor that specializes in his condition, but it will cost $8000. Any help would be greatly appreciated, and used to save my son’s life.