The US will never build another station at the inclination of the ISS. That was solely a concession to satisfy Russia so they could be a partner. Moving that equipment to another orbit isn't economically feasible.
For context, inclination change maneuvers are often the most expensive type of maneuever, even topping launch from the surface to LEO depending on the altitude and amount of inclination changed.
https://en.wikipedia.org/wiki/Orbital_inclination_change#Cir...
(The circular orbit inclination change is sufficiently simplified for a back-of-the-napkin comparison.)