Rollover tax questions - anyone been hit with unexpected fees?

• •A decent portion of it is in precious metals, always felt good having that hedge.
• •I've been thinking about rolling over some of my traditional IRA into a Silver IRA to get even more exposure to physical metals.
• •Are there any specific things I need to look out for that aren't immediately obvious from the glossy brochures?

Okay, so I'm a physician up here in Boston, and I've been in the game for a while now, sitting on a good chunk of my retirement in a diversified portfolio - probably between $500k and $1M by now. A decent portion of it is in precious metals, always felt good having that hedge. I've been thinking about rolling over some of my traditional IRA into a Silver IRA to get even more exposure to physical metals. I know the general rules about 60-day rollovers and direct trustee-to-trustee transfers to avoid taxes, but I’m hearing whispers about hidden fees or unexpected tax hits on the back end from folks who weren't careful.

My concern is less about the actual rollover process itself, which seems pretty straightforward on paper for a direct transfer, but more about some of the less obvious implications once it's done. Are there any specific things I need to look out for that aren't immediately obvious from the glossy brochures? Like, capital gains on the silver itself if I ever decide to liquidate, or any oddities with the contribution limits if I'm also putting money into my 401k? I’m generally pretty on top of my finances, but this specific area of precious metals IRAs feels like it has a few more nooks and crannies than a standard stock or bond portfolio.

Has anyone here had a rollover experience that ended up costing them more than they anticipated tax-wise? Or maybe some crazy fees from a custodian they weren't expecting? I'm trying to dot all my i's and cross all my t's before I commit. I've been doing my research, and the Learning Center at https://learn.goldirablueprint.com/?forum has been a solid resource for a lot of the basics, especially for the educational components. But sometimes, real-world experiences from people in the trenches are even more valuable. Any insights would be hugely appreciated!