<human>: So right now my in-laws have 3 cats; a mother and two daughters.  The daughters are fine but the mother is having and causing some serious issues.  

First; she has some sort of skin disorder which is causing her to bald in a few areas and get numerous areas of skin irritation which open up from time to time.  They don't have the money to take her to the vet any time soon (a long story...) and it makes it so we cannot really pet her without risk of touching a rashy, oozy area.

Second; she seems to be having mild seizures from time to time (my mother-in-law has had pets with seizures before and she shows the same symptoms) so we are also concerned about her quality of life in that area.

Lastly; she poops and pees everywhere but the litter box.  She mainly confines herself to a room that's not used very much, but she's so bad about it that the floor and the carpet are completely ruined and need to be taken up.  She has apparently done this for a long time and nothing has worked to shake her of this behavior.

My mother-in-law really loves the cat, but is starting to feel like the only option may be to euthanize the cat which she really doesn't want to do.  I've considered finding a farm around her where she could run around poop and pee anywhere, but she's getting older and I don't think she's much of a mouser (the main reason I'm told a farm would consider taking a cat in).  Also while she goes outside all the time, she's mainly an indoor cat and is a people person (when she gets to know them) so I'm worried she'll suffer emotionally from being put in a strange place.  The pound is out since they'd just put her down anyway and we don't know anyone else who would or could take her in.

So

Condense the text into a few key points
<bot>: cat is ruining the floors, has mild health problems, and there seems to be no options for my in-laws to turn to.  Reddit, what should they do?