I know what you mean about the corners of walls. *argh* What is it with dogs, no matter what breed, feeling the need to rip walls apart? You take everything you can think of out of one room...except for toys, blanket and food/water bowl...and they STILL manage to tear something up.
So, the OP only wants to keep his dog inside until it's older, then boot it outside. Man, talk about cruel. Give the dog all the comforts of the world...t.v, bed, controlled ac/heat, companionship....then rip it right out from under him. Yep, that's so much better than housetraining your dog from the get-go and letting him stay inside. What's wrong with taking your dog for walks a couple times a day, with letting him potty outside, feeding him inside at designated times, loving him 24/7, having a snuggle buddy and guardian, crating him when you leave for his safety (or letting him have his own room)...I just don't know. I've had inside and outside dogs and the happiest and most well behaved were the inside dogs. Outside they get lonely, bored and very over excited when they finally do see you. Inside they know where you are, can coerce you into playing with them, have constant companionship and more entertainment than ever.
so, what's wrong with being an inside dog?