doreamon,
fully agree with soupie. it's best to get a play pen. make the size as big as ur area(where u want to leave him, e.g kitchen)can allow. U can leave him in the playpen when u're at home, let him come out to play when u're back. tt's wat i do. coco is in the pen while we're at wk. he's still young so wun let him roam the hse till he's really tame and 100% paper trained.
Don't worry abt wye wye being sad. leave toys (can get a kong to stuff food in it, coco loves that. keeps him occupied),bones(for him to bite) and water in the pen for him. also need to give a corner for papers for wye wye to pee/poo.
when u're home, release him and start ur trg with him to stop him from biting any furniture. must be firm.
alternatively, like wat soupie say, give him the whole kitchen and get a baby gate. but check that ur kitchen is puppy proof. no fixture that can be pulled or chewed, nothing that can fall off the cupboard or table top when he pulls or tugs at it.
over time when wye wye grows up then he'll be ready for the whole hse. If u don't put a stop to this, wye wye will grow up to think that it's ok to bite and chew furniture when u're not ard. This way u give urself, ur FH and wye wye a chance to live together harmoniously. Wye wye behaves and wun anger ur FH and give him a chance to tell u to sell wye wye away.
Dogs are like kids, they need to be educated and trained. You as his parent will also have to set house rules for him to follow.
If u're getting playpen, can buy from any petshop. the price is abt $6-10 per pc, don't get ripped off like me. i paid $18 per pc !
. If getting a baby gate, i think Ikea have. If not shops selling bb stuff should have.