New Handicapped Accessible Home

My sister, Marlo, was born with Scoliosis.  It has progressively gotten worse and a few years ago she had to have metal rods installed.  She just received news that  she has to have another surgery to install more rods in her back.  My sister is single and relying on disability to make ends meat.  Her husband passed away in his sleep a few years ago.  She is living in a mobile home that she rents in South Carolina.  Her "home" is falling down around her and is not anything remotely close to being  "Handicap Accessible".  Earlier this year, she fell through the floor and had to be pulled out by the fire department.  X-Rays confirmed she broke her foot.  A short time later, she was crawling through her truck to unlock the driver's door, slipped and broke her other foot.  The key apparently does not work for the driver's door.  My sister just turned 51 and her condition will continue to get worse as she gets older.  She is obviously unable to work.  I am hoping to raise enough money to build her a small and modest 2 bedroom 1 bath home to meet her ever increasing needs.  Maybe, by chance, I can get her truck lock fixed too!  

Any help is appreciated!