Maybe Apple would like to buy only part of Sony - just the gaming division. That would be a lot cheaper for Apple than buying all of Sony.
Cost is not the issue at all, they can afford all of Sony easily
Maybe, but it would also be easier to manage, easier to assimilate, and easier to actually accomplish (since some people say that the Japanese government would oppose Sony being sold, and that makes sense). Not saying it's going to happen, personally I don't see any of this happening, just that this would be more likely.
Currently Playing: Shin Megami Tensei: Devil Survivor Overclocked, Professor Layton and the Curious Village
Anticipating: Xenoblade, The Last Story, Mario Kart 7, Rayman Origins, Zelda SS, Crush3D, Tales of the Abyss 3DS, MGS:Snake Eater 3DS, RE:Revelations, Time Travellers, Professor Layton vs. Ace Attorney, Luigi's Mansion 2, MH TriG, DQ Monsters, Heroes of Ruin