If it’s a half inch from one spoke to the next that is a much different thing than a half inch across a quarter of the wheel rotation.
The times I’ve had to save a wheel that far out I dropped tension, gently bent it straight with blocks on the floor, then retensioned and trued. It’s much harder to fix out of round bends than out of true bends.
I should also point out that for reasonably inexpensive wheels it is never worth it if you have to pay someone else to do it. Every time I’ve done it has been helping a friend who didn’t have the money for a new wheel at a moment when I had the spare time. I suppose it also keeps some parts out of the recycling heap.