Help her to regain her mobility. (anything helps ❤️)

Hi my name is Chris, I live on a fixed income and really need help with Managing my pups arthritis in her knees... she can barely walk now and I can tell she's very down about not being able to do the things she loves to do which include going on walks with my other pup. She spends most of her time laying down now and we have to bring her to the vet to get blood work done but we also want to get her a sort of wheelchair so she can go on walks again and regain her confidence. Please help in any way you can to help her regain her mobility and confidence! Anything helps.