Horses are called hay burners. I would guess it's because all they produce is manure.
A sane and realistic comment to that:
Hay, grain, vitamins, vet bills, farrier, gear and machinery, don't come free.
Assuming there is already stall and fencing already there.
To use them you need saddles, bridles, blankets, lead rope, and know how to train one.
Be nice to have a carriage and sled.
My wife loves horses and I'm married to her.
One horse doesn't break you!!!!!! Loving horses could.