What is the size of the new house in the crown store? Staple Homes (small), Classic Homes (medium), and Notable Homes (large)
Has a Notable Home been released for Western Skyrim yet?
Proudspire Manor is a Large home (300 slots / 600 slots with ESO+) you can find it under 'Classic homes'.
The Notable house for Western Skyrim will be Bastion Sanguinaris (350/700 slots) in Blackreach.
But that one will probably be a Crown Store only house, which is why they haven't announced it yet.
Also, the naming can get a bit confusing but houses are:
Staple: Apartment (50/100) or Small (100/200)
Classic: Medium (200/400) or Large (300/600)
Notable: Manor (350/700)
It's usually better to just refer to the slot size, since Proudspire Manor isn't an actual 'Manor' for example
It's worth mentioning that Proudspire can be purchased for in game gold, around 1 million, unfurnished of course. But you need to complete Greymoor before it's available.
"I bear the cruel weight of certainty. Total, absolute, relentless certainty. People rarely comprehend the luxury of doubt... the freedom that comes with indecision. I envy you."
―Sotha Sil