Help us go from camper to house

My name is Kaitlynn Ferguson. Let me start by telling you a little about me and my family. I am 24 yrs old, my husband Christopher Ferguson is 26, and we have two beautiful children Micheal-Shane who is 4 and Justin who is 1. We are currently living in a 2 bedroom camper on two lots in a camping section.  Which brings me to the reason I am asking for help. We need help and don't know where to turn. With in the last year my son Micheal-Shane was diagnosed with autism along with that comes many issues that we facing. We love are son very much and we want what is best for him however the size of our home has become the biggest issue and struggle and the cause of further issues. Not for me and my husband we can deal with it but for my sons especially Micheal-Shane for with his autism comes anxiety, communication delays (he is currently nonverbal), sensory disorders, and anger issues (due the other issues). He needs space for him to run and space for him to calm himself when he gets frustrate. We are planning to get a septic and build an addition over our camper but we can not afford it right now it will be years before we would be able to do that. That being said the problem is him not having the space he needs to grow is delaying his progression. It hurts me so much to know that he needs that extra space and we cant provide that for him. At that my question is can/will anyone help us achieve this goal for my loving sons?? Please if you can help us or you know people that can please, please, please, let me know. I'm not to proud to admit we need help to provide this for our sons.

Sincerly,
Kaitlynn 
Ps. God Bless