A year's worth of daily 5000 IU (125 mcg) Vitamin D supplements costs approximately $15, so you could also just supplement.

Strangely the protective effects of vitamin d for heart disease appear NOT to be achieved through supplements. (Though the protective effects for cancer ARE)

I’m going to go out on a limb and guess that people who get outside a lot protect their health through both natural vitamin D from UV light exposure and cardiovascular exercise.