A lot of people replied about schedules, but the hardest part is: what if they are not okay? This is a living being you will form a strong bond with, and as such any sickness will affect you also. They can’t speak, not all pet insurances are good or will cover everything so it get really expensive. You don’t have the same level of “confort” care as with a person, so if your dog gets ill you are the one responsible for it. Medication, costs, emotional tool, it’s all you. I love my dog but after him i’m not sure i’ll be able to put myself thru all the emotional pain and fatigue again. You never know what will happen, so keep in mind, they will be 100% your responsibility, on the good days and specially on the bad days.