Help Me Breath

I was recently diagnosed with a number of congenital heart defects.  They are inoperable and I do not qualify a heart/lung transplant.  With the little time that I have left, I wish to enjoy it with my family, doing the things and going places that we enjoy.  Unfortunately, I am severely limited in my  physical activity by my inability to breath.  I was able to secure a mobility scooter to help get around, but the insurance companies, in their infinite wisdom, refuse to provide a portable oxygen generator to allow me to breath easier when I am out.  I have located a supplier of these concentrators and for about $3500, I can purchase one.  This concentrator represents the freedom that I so desire to spend quality time with my children and grandson.  Any help would be greatly appreciated and, please, share this story.  Thank you and God bless!