I quickly threw this together, so your price range is at least doable. This is about as cheap as I can get while still having 16GB RAM and more than 8GB VRAM.
https://pcpartpicker.com/list/7D2Zck
You might want a bigger SSD. Maybe upgrade the CPU slightly. And maybe a better mobo.
Faster version: https://pcpartpicker.com/list/rQqVFP