I'm thinking of caging off my dog when I don't want to watch him
Do you normally take good care of your dog?
I give him food when he asks me for food. I take care of him when he's sick. I play with him daily
Sometimes putting your dog in a cage is a smart idea because you can't always be around to watch him, and he'll be safe in a cage. As long as you don't keep him in there too much and make sure he gets enough exercise, then I think that's fine to do.
I don't understand what you mean by enough exercise, I just want him in this cage as long as possible when I need to go somewhere.
Crating a dog is okay, it will keep him safe and allow you to do what you need to do. Just make sure that it is a big enough cage.