small house— where is your litter box?

we have a 1200 sqft house. 3 bedrooms, but only two of them are occupied. our litter box is in the third bedroom closet that stays open, there’s nothing in the room except a treadmill and a few other small things. my husband and i are trying to plan ahead for our future second kid, and of course we would need to relocate the litter box. but we have no where else to put it??? i’m not a fan of the “table but it’s really a litter box inside” thing nor a fan of the litter robot and similar. our hall bathroom is entirely too small to fit our current litter box. any ideas??

eta: i asked for ideas on litter box placement, not comments on what i consider to be a small house. thanks.