Hey! I have three Pekin ducks which are about 8 weeks old. As for how much time I spend caring for them, roughly my husband or I spend around 1-2 hours a day. Our current "duck" routine is - As the sun rises, I head out to their coop to let them out .... and ... set up their pool, fill it with water, wash out the bottom tray of their coop, air out their nesting boxes so I can scoop the poo out later, wash and refill their water dispenser, set up their food, and re-secure the run. ... that's the am .. As the sun sets, I head out to persuade them with mealworms to go back into their coop but not before checking their feet and body for any medical/health issues. Once their are inside I start to clean up their poopie filled run, empty out the water from their pool, clean and refill their waterier so I can put it back inside their coop for the night, and re-secure their run/coop.
A lot of attention needs to be given to securing their coop. For example, I have a solar powered, motion- sensor flood light that activates whenever something comes close, as well as locks for all the doors/nest boxes (raccoons can open locks), motion-sensor alarms that activate a piercing noise whenever movement is deducted, and a few heavy pavers to discourage a predator to dig. I'm waiting for the motion detected water sprayer to come tomorrow. -- I know it may seem like overkill but if you search this forum, you will easily see how many birds become prey to cleaver and hungry predators.
... Lastly ... I would NEVER leave a bird outside UNATTENDED for longer than 12 hours. Why?- search the forum or watch YouTube videos.. They are sitting ducks! Plus they SPILL everything you give them and will eat all the food and water you leave out within hours. It's insane how fast my three go though their gallon water thing.!!
Good Luck!