What type of assistance is available for veterans?

My uncle has Alzheimer's & my aunt have no other finance but the veterans retirement. He is 78 & my aunt is trying to care for him buy herself. She is 77. The live on a fixed income. They need lots of help. A walk-in tub. A mobile unit that lift to the downstairs area. Help with uncle Herman. He needs to walk & go to the park when its warm outside. He served in the military for 4 years and it seems as if he can't get any help. What are our rights to a dignified support system without leaving aunt Betty out on the streets?