A month ago, someone took in a stray cat that was crying to everyone passing by. This person thought the cat might be hurt, so they decided to bring her home. They cared for her by giving her a bath, grooming her, and feeding her. However, after a month of taking care of the cat, this person feels they can no longer keep her. They have serious allergies to cats and also have limited financial resources. They already have two other rescued cats, which they feel is the maximum they can manage.
The person has been feeding all the cats Purina allergen food, but adding the new cat has made food and litter run out quickly. They have been trying to find a new home for the cat but have not been successful. They are cautious about where the cat goes, especially with Halloween approaching. This cat is very sweet, does not scratch or bite, and even seems to dance at feeding time. She prefers to sleep next to the person, often cuddling.

Living in NYC, they feel that shelters are not a good option because they believe the cat would not be treated well there. They are seeking advice on what to do next. What suggestions do others have?
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Reddit source: Reddit, shared by u//u/Safe_Ad3862