Shelters keep the cats in cages smaller than that, with the food and water on one end and the litterbox on the other. He'll be fine.
Since this is a long-term thing you might consider getting one of those cat cages with shelves. That way he can jump up on a shelf and have more places to sit than just on the same floor as all his stuff.
Since this is a long-term thing you might consider getting one of those cat cages with shelves. That way he can jump up on a shelf and have more places to sit than just on the same floor as all his stuff.