in terms of space i think if i had my whole apartment bunny proofed maybe it'd be enough for 2 buns (bathroom would be off limits tho) but bunny proofing is expensive (the fencing used in my bedroom alone was around $70 and that's not even including things like tubing for protecting cords and zipties to make the fencing sturdier) so rn zelda and i share my bedroom. she's only allowed out when i need to sit on the recliner to trim her butt fur or nails