I need a low cost treatment for my dogs mange. Anyone know of a natural cure?

I have spent in Excess of $900 at two different vets. I live in a big city with the best care. I am going at a different angle because I am worried that she will become Toxic from meds. Please Dont Answer if you need to be Critical. We adore our pet.
This Is DEMODICTIC mange

Unfortunately, Demodectic mange is the worst one, as it is caused by the parasites that already live in all of us. It usually comes out because of a weakened immune system, which can be caused by a malnourished mom, or removing the puppies from mom too soon. Please do not take your dog off the vet meds. It takes a long time for the symptoms of this kind of mange to go away, and if you pull the meds now, you might have a nasty recurrence.
I have a dog who I adopted at three months-she had mange so bad she was completely bald. We gave her all the meds for 7 months, and she is now completely a beauty queen. My vet gave me an immune system supplement vitamin to boost her immunities. It is only available from a vet and is called Duralactin. It is made from mothers milk and has mom’s immunities in it. It strengthened her immune system and enabled her to heal much faster than normal, and she has no bald patch recurrence at all.
You also need to know that this type of mange can recurr at any time during your dogs life, and you will need to be on the lookout for it.