Going by the assumption of White victory, it'll take the better part of a decade. Look at Syria.
Look real fucking hard at Syria, because for the longest time, our enemies WILL retain control and usage of the oceans, so while the West and Northern East Coast will get isolated, they are also incredibly powerful port cities and will be hard to starve out, harder than you would think. All those toys and other useless garbage, can all be shifted to war materials and food relief. New York City is, iirc, mostly supplied by ports anyways.
The other reason to pay real close attention to the Syrian Civil War is to watch how long it took for the SAA to completely collapse and shed disloyal members, and how long it took for MSM to even say it was a civil war. We need, desperately need, for the US Military to break apart and disunite, a platoon of ATF/FBI/DEA with an APC or three is one thing, but a MBT battalion with artillery battery support is entirely another.
Good news is, it is likely to happen. Bad news would be why. It will take a severe and horrifying atrocity and warcrime, going unpunished, for things to truly fall apart. And much worse and bigger than Syria series of atrocities, since Syria was barely united to begin with anyways, while ZOG incorporated spends nearly as much time on indoctrination as the PLA, if not more if you count lifetime experiences.
For the first half of the conflict we don't need them on our side, just out of the way or disintegrating. If its just faithful Whites vs the Left and Federal Agents+hardcore pozzed up LEOs, thats a winnable fight in terms of naked force. But it will take a while.
Afterwards, after large swathes of the country are secured and made nogo zones for the wrong people, then the real fun can begin. Reintegration and restarting oil refineries for fuel, reintegration of surviving Heavy Metal Assets, AFVs, Air units, etc, and eventually at least a single Carrier Battlegroup, just one, to shutdown the relief efforts in the Atlantic.
Ten years minimum. My mother would be 60 about to turn 61, i'd be in my later 30s by the time the fighting stopped. My grandmother would most likely be dead, as would most of my Great Aunts and Great Uncles. Assuming I survived.
Also, you have to keep in mind White America's shitty demographic profile at the moment. Median age is 42, and a disproportionately large number of Whites are Boomers and the others over that age. The majority even. So a significant numbers of Whites are dead weight. Literally if war breaks out.
Also, keep in mind the demographics for fighting age males. Whites are already in the minority. Not will be, but already. Demographics charts like these don't count illegals, but for a war, illegals exists.
So straight up? We are already the minority, so 85 million post war is actually assuming significanlty positive k/d ratios across the board.
1. Secure the Rust Belt, it has the least niggers/others by proportion, but a large number of retarded traitor whites who could blend in, however a number of those are childless boomers. So securing the Rust Belt is first on the to do list, its the easiest place to build a base of power.
2. Invade and secure the South. It's gonna get hot and hellishly brutal, the greater Atlanta area is gonna be a brutal warzone, the fighting will be extremely intense and will last a while, so assuming the center North is secured first and it should be, secure the South.
3. Texas. Refineries and oil. I honestly feel worse for White Texans than White Californians, because White Texans don't quite realize whats going to happen. It'll be a charnel house, one bad enough that every military base in the state will be written off by the Feds and everybody else. We might honest to god lose Texas. New Mexico, Arizona, California, and Nevada should already be considered as loss the moment things go hot, but Texas falling is going to hurt everyone.
I'd expect any Mexican invasion, Mexican Army or Cartel, to focus there and focus on the refineries. And the spics aren't niggers, they are capable of learning to fight, at least as infantryman, and will be dangerous.
During all of this, there is Canada to consider and the outside world shipping fucktons of supplies to both coastlines.