Gold IRA Fees - My Breakdown and Some Questions

• •I've been holding physical gold in my IRA for about 7 years now, and with the market doing...
• •well, whatever it's doing these days, I've been looking at diversifying a bit more into silver coins.
• •My current custodian charges a flat annual fee for storage and administration, regardless of asset value.

I've been holding physical gold in my IRA for about 7 years now, and with the market doing... well, whatever it's doing these days, I've been looking at diversifying a bit more into silver coins. My current custodian has been fine, but I'm trying to be super diligent about fees as my portfolio has grown (sitting comfortably over $750k now, mostly diversified, but my gold allocation is a significant chunk). I'm in Boston, and while I've got a decent understanding of my current setup, I'm trying to get a handle on what other folks are paying, especially for silver.

My current custodian charges a flat annual fee for storage and administration, regardless of asset value. It started out feeling pretty reasonable when I first opened the account, but now that my gold holdings have appreciated significantly, I'm wondering if a percentage-based fee structure might actually be better for me, or if I should just stick with the flat fee and find a cheaper flat fee provider. I know some companies differentiate between gold and silver storage fees, which is what's prompting this deep dive. As a doctor, I'm usually more focused on patient care than micromanaging every penny of my investments, but with inflation and all, every little bit counts.

Specifically, to those of you with significant silver coin holdings in an IRA: What sort of fees are you seeing? Are they flat, or percentage-based? And does anyone have a good breakdown of the actual "all-in" cost after considering things like precious metals dealer markups (which I know isn't a direct IRA fee, but it affects the net investment)? I've used that Eligibility Checker tool a few times just to see what different companies might offer for my portfolio size, and it's given me some interesting leads, but it doesn't give me the full picture on the fee structures themselves.

I'm also curious about initial setup fees. Did anyone manage to get those waived, or are they pretty standard across the board for a new rollover? Any war stories or glowing recommendations on specific custodians for silver would be hugely appreciated. Trying to make sure I'm not leaving money on the table here, especially if I decide to add a substantial amount of silver coins.