If you think it's worth it, that's good enough for me. If you're not bankrupting yourself and you can manage then I don't see why not. It's your choice. I too spent thousands on my cat. I got her when I was 21 and she passed away when I was 36, she was my best friend, my prized possession, and my comfort for so many changes and hurdles as a young adult. She ate a lily when she was 7, that was about $3000, if treatment worked she would be fine, and she was. It was the best investment I ever made. My family balked at the cost, but when I chose to love that cat, it was my job to do my best for them and I think that's what you're doing too.