Cabin to Heal

Hello, I have been suffering with PTSD for about 25 years. For most of the time, I have been able to keep it in check, but recently the nightmares, and sleepless nights have returned.  The only place I have been able to sleep more than a couple of hours, is on our friends land where we LARP. Another friend has a cabin there, he lets us use on weekends, unless he is there, and I sleep all night with out reliving my past, and wake up normally. 
My lady is getting worried that she will come home one day,  and find I have taken my own life. 
Our friend is letting  us build a cabin of our own so I can have a place to heal my mind, but we do not have the funds for it. That is why I am asking you if you would help. 
Thank you for your time. 
Scott