Help Zayne have a peaceful passing

I didn't want to do one of these, but in-home euthanasia is not cheap. It is going to cost $600 in total. That's with a communal cremation. I may have to break down and take her to the vet. I wanted to try this first. I don't mind swallowing my pride if that means my girl can have a peaceful ending. She HATES the vet and is still mentally aware. Please help me save her from being terrified in her last moments. I owe her this...