|The task of watering, feeding and mucking the stalls would have taken more man-hours per day than Noah and kin had.
Life on the Ark would have been very tough for humans, animals and plants.
Just thinking out loud here...
Feed, desalinate water, water and exercise animals, shovel shit.
Moisture problem... one window.
Do everything in pitch dark because there was only one window and one door and no electric lighting.
Oh, torches you say? No problem - you got me. Maybe not. What fuel for the torches? What about fire hazard what with the animals and the methane gas.
Do everything in stultifying stench, temperature, humidity because there was only one window and one door and no air conditioning.