IIRC if you have an account at Fidelity and are anywhere near one of their in-person offices you can make appointments with their advisors for free to look your plans over. I think @Tass may have done this recently and might have comments on how it works/whether it was helpful.
If you really want a big-picture look from someone familiar with early retirement, I would ask ahead if they have someone who has experience with that before setting up a meeting. The guy we talked to was a Certified Financial Planner and was able to answer some technical questions about 401k rollovers, which was helpful, but in terms of specific plans he mostly defaulted to "typical" advice.
For example:
Me: I have the ability to contribute Roth dollars to my 403b, what are your thoughts on that?
Him: At 30 it's a great idea to do that. The average American* pulls their pretax money back out in the 24% tax bracket.
Me: We expect to retire in the 12/15% tax bracket, which is the same as where we are right now, so I'm not sure that's really an advantage.
Him: But with a Roth, the growth is tax-free.
Me: Yes, but that's pretty neatly offset by the tax savings now if you invest the difference.
Him: Ah, well, most people don't invest the difference.
Basically, he didn't tell me much I didn't already know, and I seriously doubt he would have been able to discuss the minutiae of (for example) Roth conversions to generate taxable income to get optimal ACA subsidies.
*I'm pretty sure he said average American, but I think he must have meant their average customer, or maybe just the average American with a 401k... no way is the average American in the 24% tax bracket in retirement.