The spikes around the lights are called 'diffraction spikes' and are cause by the lens aperture blades.
The wider the aperture used the shorter the diffraction spikes are.
As far as the DoF, DOF gets depper the further away from the camera the focus point is. You used a 50 mm lens at f/10. According to an online DoF calculator, using a 50 mm lens at f/3.5 and a point of focus 2500 feet from the camera, the near DoF limit would be 115 feet from the camera and the far limit would be infinity. Even with your point of focus at 5000 feet the near DoF limit only increases to 120 feet. The far DoF limit will stay at infinity.
The white balance in you photo needs adjusting.