Euthanasia and cremation due to cancer

My name is Lisa and my beloved fur baby is Sophia. I rescued her after my 14 year old Genny passed unexpectedly. Sophia is 17 now and we've had a beautiful year together. She is loved beyond words and I'm missing her already. She's loosing weight at an astronomical rate even though her appetite is ferocious. I hold her, talk to her, and ask her if I'm doing right by her. Our vet and I are in agreement on her health plan and unfortunately her end is coming on fast. She purrs so loudly even before she's touched and befriends everyone she meets. Sophia deserves a calm departure from this home that adores her.

I'm on a fixed income and am asking for unselfish help so her passing is what she truly deserves. I'm unknown to her previous 16 years of life but I gather it was rough. Please help me in awful cause.