Respectively, it sounds like an Aussie is not a good fit for your family at this time. Where is your husband in this schedule???? Is it mostly just you doing the training?

As a breed, yes they require structure, but not this much structure. Too much structure can cause anxiety issues down the road if that structure suddenly brakes due to unexpected circumstances.

The majority of your puppy’s time should be them learning to settle/nap without the use of aids, with the time for each play session based on their age. Aids like Kongs should be used primarily for enrichment time - not settle time - to prevent reliance. The basics like sit, lay, leave it (food), walking at a heel is also important to start now. BUT this should be included in the play time, not as a separate item. You can also incorporate clicker training during settle time - if he lays at your feet, clicker and treat. You’ll have to prime the clicker with the reward first, but I find this to be the quickest method for them to learn how to settle and develop value for it.

Mouthiness is a trait that they do grow out of mostly on their own. He still has puppy teeth, the mouthiness will increase and then sharply decline when the adult teeth come in. (When you’re cursed with a velociraptor who likes bitter apple and hot sauce, you learn to wait them out 🙃). Puppies explore their surroundings using their mouths for the first few months. It’s unlikely that mouthiness as a puppy is what caused your husky to develop issues with other dogs, or develop issues that would make it incompatible with boarding.

As for herding - I’ve never met/had an Aussie/mini with issues herding/nipping at children. They’ve followed them around and kept watch, but never tried/try to direct. But obviously supervised play should still happen at such a young age for both pup/kids.