The question at hand actually concerned how plausible a case for Hank being a drug kingpin could be made given Hank and Marie's current financial situation. I may have muddied up the water a bit by making the comparison between Hank and Walt.
We all know that Hank doesn't have enough evidence to get a case to trial against Walt, yet. But if Hank can get a real confession out of Jessie or Skylar, Walt's done. There are no smoking guns out there in the form of witnesses or other hard evidence strong enough to get an indictment against Hank.
My point was that even after a thorough investigation the DA would not likely have enough evidence (well, no evidence, actually) to even file charges against Hank. There is evidence out there against Walt, but Hank (or someone) is going to have to find it.
Maybe, but the DEA has already learned about Gus Fring, who led a very humble life and didn't appear to own anything more than a chicken franchise and a (very unflashy) station wagon.
was able to hide his massive fortune and pass himself off as just a normal guy, then Walt would probably be able to argue the same for Hank. Heck, maybe he could even plant some of his money under Hank's house or in a secret bank account as further "proof" for the cops to find.