You think they stop cooking meth now, and don't even try to fill the void they created?
OK

Not like I know how that #### works, I just figured that's what the show is about
Even though Walt is close to "broke", I think we'll need to see some sufficient motivation come in that convinces him to keep cooking now that he can presumably 'get out' and just live off of car wash income. Skyler said they were close to turning a profit there without the laundering.
ego brah, ego
Yes, there's that, but I don't know if I would buy that ego, alone, would have the Walt character return to cooking & becoming the void-filling drug lord. I think the writers will have to come up with something more than that to sell it.
Seriously? This is the show.
To date. I'm with Sarnoff. Obviously, it's unlikely that they write the rest of the show with Walt just running a legit business, but I think that he'll at least give that a shot until something comes up. That character, while he has plenty of blind spots, isn't an idiot and a seemingly free and clear way out with a legit business to support him family...
it would be a logical decision. Much more so than going back to cooking just because he's wicked awesome crazy ego guy. He's had his fun, he "won", and so he at least needs to try to live normally given the window of opportunity in front of him as he sees it with the evidence destroyed. From a writing standpoint, that makes more sense. That's not to say that other factors, including eventual boredom, won't conspire to alter than plan.