Regardless of whether a dog is an "outdoor" or "indoor" dog or not, you can ALWAYS train them to be housebroken, especially at their young ages they can learn so quickly!

And don't knock that they won't dig... neither of my pups dug so I thought it was safe... then one week I came outside and Charlie had dug up EVERYTHING.. I had to cover all the holes before the landlord came home to see them... And ever since, every now and then if I don't keep a watchful eye on him while he's outside, he'll wander off and dig more haha

And about the crate -- its always best to buy a crate sized for their projected adult weight, that way you won't have to waste money buying new crates if they outgrow your current one. And I don't recommend putting them in the same crate if its "barely" big enough to hold them. Perhaps get two, and place them side-by-side so they can still see and "talk" to each other?