Patty's tiny home

My name is Corena. My sisters name is Patty. She was diagnosed with severe Rhumatiod Arthritis 25 years ago. She had her first heart attack when she was 45. Since that time she's had at least four more heart attacks requiring stents. Her last heart attach two years ago required open heart surgery. My sister has worked since she was 16 years old. The heart attacks and RA forced her to be put on disability. She had to give up her home and all she could afford was a run down little mold ridden, falling apart, trailer. Because of the mold she got phnemonia and was hospitalized for 9 days. She has to go in every 6 months for a CT scan to check on her lung nodules. My husband and I came up with the idea to build her a tiny home. My husband already had a lot of the materials that he had collected over the years. Thanks to our wonderful friends we were blessed with all of the windows and other donated materials. My husband has done all of the work his self, along with the donated help of friends, on top of having a full time job. We need to do the insulation now and we just can not afford to do this. Every extra penny my husband makes has went in to this little home for my sister. Once my sister gets in to her new little home there will be no more mold. Her home is being built on our property so she will be right here for us to take care of.
The donated walls are 6" and R42. We are trying to have sprayed foam installed in the ceilings and around the windows. The best estimate we got is $1800. We just can not afford to do this ourselves.
My sister having a brand new, new to her because most of the materials my husband collected over the years and some things have been donated, would be life changing for her. 
Please help us give her a much better and safer life. We  need this insulation to finish her little home.
Anything over the amount we need would go to plumbing, electrical and drywall.
I know there are true angels in the world. Again, this will be life changing for my sister, all for the better.
Thank you so much.
Corena