Help me get Piotr to the vet

I do not know if this will work but I will hope with all my heart.
We got three cats, we took them all in a diffrent times from diffrent more or less bad situations.  When we got them my husband had a job and we were sure we could give them all the care they needed. He lost his job and since then it has been a struggle to just keep it going.
We got to know that they all have diffrent problems,
Sirou our first and youngest little quy hade to go in to the emergency two times because of crystals in his urine and is now on a special diet.
Ella our little snuggly girl has some problem with her stomach and need special food to keep her stomach kind of going as normal or she will have problems with her anal glands which will burst if not taken care off. And she has some problem with her teeth.

And then there is Piotr, who has thyroid problem and is as the other two on a special diet.
The reason I am writing now is that Piotr has been acting weird, eating less, sleeping more. And is now down to not eating at all. We do not have the money to take them to the vet if something happens as it is right now. I just wish the peace of mind to be able to give them the care they need. If we have to rush him to the vet I want to be able to do so and right now that looks like something I will have to do.
So I ask for money to be able to pay vet bills so I will know that I can take him there when needed.
They are lovely cats that deserve a good life, they mean the world to me. I dont want to be the sob story but I got diagnosed with autism and I do not have much of a social life nor can I really keep a normal life togheter at all, like cleaning, good sleeping patterns but since I got my cats I had to be better and they made me better. I want to be deserving of their trust so, please, please help me get the money needed to take care of them.

Thank you.