Custodian fees for my Platinum IRA - what am I missing?

• •I've been doing my due diligence, comparing the usual suspects like Augusta, Goldco, and Birch Gold on their fees.
• •I thought I had a handle on things, but now I'm seeing such a wide range in custodial fees for the Platinum.
• •Some are flat annual fees, others are tiered based on account value, and it's making my head spin a bit.

I've been looking to roll over a portion of my TSP into a Platinum IRA – about $750k I'm thinking, just a hedge against this inflationary environment. I've been doing my due diligence, comparing the usual suspects like Augusta, Goldco, and Birch Gold on their fees. I thought I had a handle on things, but now I'm seeing such a wide range in custodial fees for the Platinum. Some are flat annual fees, others are tiered based on account value, and it's making my head spin a bit. Is it just me, or does it feel like this is more opaque than it needs to be?

For context, I'm a retired Navy Admiral here in Virginia Beach, and I'm used to clear, concise information. This feels like searching for a needle in a haystack, and frankly, it's frustrating. One company quoted me a $225 annual fee for accounts up to $1M, then another said $275 regardless of value, and then a third was talking 0.15% of the asset value which, for $750k, is a fair chunk of change. This is for essentially the same service, holding physical platinum. Am I overthinking this, or are there genuine benefits to paying a higher custodian fee with certain companies?

I’m particularly interested in hearing from anyone who has a Platinum IRA with a similar balance. What custodian did you go with and why did you choose them? Are there any hidden fees or charges I should be looking out for that aren't explicitly stated on their websites? I typically use a comprehensive tool like the Retirement Planner to project my retirement income, and these variable fees are making it tough to get an accurate long-term picture. Any insights would be greatly appreciated.