OP, this really is solid advice. What's the hurry here? Even factoring in some shipping cost on that first order, it still comes in well under anything available through brand-name or compounded channels.
Worth remembering too that a meaningful chunk of people either can't tolerate this drug class or don't respond at low amounts. So even with a low-and-slow plan, you might end up needing to increase faster than expected just to see benefits, or discover you simply can't tolerate it at all. Too many unknowns going in. Grab a single starter kit, test it on yourself and family first, before committing to a bigger order. Agree with everyone else that the mid-size vial option makes more sense.