"How is home, brother?"

Translation: Habari za nyumbani kaka ?

[jojo2glo]

Difference between za and ya anyone?

[AnnYebei]

Is kaka a variation of ndugu?

[Ninjagizmo]

Yes, Ndugu is a synonym for kaka. They both mean brother.

[remitrep]

is this phrase used regularly by natives?

[NotaFakena1]

Why not "habari za nyumba kaka"? Is ni added whenever you refer to something as a place?

[vitoreiji]

In the specific case of nyumba/nyumbani, the former means "house" and the "latter" means home, most of the time.