I am facing a horrible moral dilemma. I'm moving to Costa Rica in early July.

[sinkingfeeling]

I have a 19 year old cat who looks like hell and requires daily thyroid medication. Andy is also FIV positive so he can't pass the health requirements to gain entry into the country.
Andy was rescued from an outside drain by my son at the Chilli's he managed. He took the little black kitten home and he and his wife named it Little Orphan Annie. They had to keep it outside because they were renting. I arranged for my vet to spay Annie and we were all surprised on the day of the surgery when the vet discovered Annie was really Andy!
I took Andy to join my other outside stray cats when my son and DIL moved out of state. I ended up with 4 cat guys that I fed and vaccinated.
Andy remained an outdoor cat until 5 years ago when I moved to Illinois. By then, I only had him and Gabby. They adjusted well to indoor living in an apartment. We lost Gabby to heart disease in 2021.
I have discussed Andy's fate with my current vet. She believes given his age and health, I should put him down right before I leave the country. I have no one here who could take him or handle the expense of his care. But, the idea of betraying his trust is killing me. We've not had a great relationship. Andy never wanted to be cuddled nor sit on my lap. He has bitten me numerous times, once requiring a tetanus shot. I have scars! However, I've never put down an animal not already dying or in severe pain. I would appreciate your words on this.
Thanks