Need vital treatment to keep Prada alive

Prada is a 17 year old beloved pet he sadly has been through alot in life losing his eye last year and his hearing when he was much younger so he now has to stay a house cat. Then in January he started to lose weight rapidly and was not himself at all , a trip to the vets in March confirmed he has a thyroid problem which means lifetime medication and constant vet visits and blood tests , because of his age we can not get pet insurance and the bills are too high since trying to raise funds so we can keep our beloved pet with us as long as possible as he is very much loved by my Autist daughter he is her go to pet when life is too much for her, he sleeps wrapped around her head, he’s the one that sits and listens to her when she can not stop talking and gives her purrs and cuddles when she has meltdowns she would be lost without him and yes I know he won’t be here for ever but she is 15 and hopefully won’t need him forever but for now she does