That is so sad! I always said that if I am ever able to get out of these darn suburbs and buy a place with some land/outbuildings, that I would allow the ASPCA to use the barn just for homeless horses. (granted, I will have to learn correct terminology and how to care for the but if there is a will...)
Horses are VERY EXPENSIVE.
Just to keep them alive you need more than just native grass (at least west TX grass).
If you live in an area where there is plentiful local feed, the price goes down...
unfortunately, we have had all these fires (less grass, less feed.)