I'm not an expert in this, but maybe the LLC is easier to setup and since it doesn't have fundraising, the money isn't taxable so it doesn't need to be a 403b.

I'm not an expert in this, but maybe the LLC is easier to setup and since it doesn't have fundraising, the money isn't taxable so it doesn't need to be a 403b. In other words, its more like a trust than a non-profit. To expand, non-profits are created to raise money for a cause, not just give it away.