Yeah, don't tell us what to do!

When my vitamin D levels were tested low, the doc told me to take 2,000 IBU daily.

~7000/day seems quite high to me. But I’m not a doctor.

I would consider if the cost of purchasing all this vitamin D - a lot of of which your body may be excreting rather than absorbing - is a worthwhile financial investment in your health. I don’t know anything about you, maybe it is.