I think you’d have to balance the stress of that whole training process and actual separation/being in a crate while you’re away, with his familiarity with your daughter. So there are some pros, along with some cons, also (as there usually are no matter what you do).
For many years we enjoyed a stress-free time when we went away as my mother lived with us and would watch the dogs. Life remained the same for them except for us being away. But they knew we’d eventually come home.
Several years back Mom couldn’t do it anymore. (As a matter of fact, we had to either get someone to stay with
her, find somewhere for her to go, or take her with us when we went away, so that became quite stressful in itself.)
We tried different things for our dog. A friend is a pet sitter and couldn’t have been nicer, coming twice a day to let him out, with DS feeding him and caring for him in between, etc. Dog was apparently pretty stressed, though. (Found evidence he peed in the house, which he never usually does.)
Our go-to has become a local kennel we’ve used for years (before Mom came to live with us, even). They’re good there. The dog goes in a large pen, where he has his bed, blanket and toys. Winds up sleeping a lot. His food and treats are labeled and they give as instructed. They have a working relationship with our vet themselves. They let him out a few times a day to ‘go’ and play in their play yard. Once when I called to check on him (while walking into Epcot!) they said he was ‘helping them in the kitchen’, lol. I mean, he dreads going. When the suitcases come out, you can see he starts to get bummed out. But once he’s there he’s fine. Not exactly happy to be there, but he resolves himself to it. And he’s learned that we come back after a week or so. The beauty is that we don’t have to stress about whether he’s ok or whether we’re inconveniencing anyone, etc. He’s bored, but safe, and ultimately, fine. If he does have an accident, the floors there are cement and they clean it up. They’re definitely used to it. So our house remains clean and when we come home there are no funky odors, haha. That is how we play it now. In comparison: at home, he seemed a little lost.
I can understand why your daughter wouldn’t want accidents in her house. If you decide you want to go with that plan, I would probably get as large a crate as I could, maybe one almost like a play yard with a floor if possible, and start to put him in that for a little while a few times a day to get him used to it. (
@Christine had some good suggestions for keeping it positive.) I think you may have better luck with something like that than with a small, classic crate. Maybe you could purchase one to keep at her house if you anticipate this will happen from time to time, as well. The dog will have to learn that this is the routine when you go away, but eventually you will be back. I think the first time or two is hardest. The big thing we have to know when we go away is that our pets are safe. It sort of comes with the territory that they’re going to be somewhat stressed because they’re varying from their routine and we can’t explain to them that we’ll be back. But do it frequently and they get used to it as a ‘necessary evil’.
Maybe something like this?
https://www.ubuy.com.bd/en/product/...-crate-42-8-l-x-28-7-w-x-30-3-h-x-large-black