What do you mean about "positioning" your career to retire on your terms? Do you want to go part-time, or mentor your replacement, or something else? No consultant, unless they worked in your firm, is going to know how best to accomplish his in your firm.
In fact, I would think that saving your money instead of spending it on life coaches of dubious value would be part of positioning yourself for retirement.
Also, what do you mean about getting ready emotionally? Are you worried about spending your days with unstructured free time and perhaps too much time with your spouse? Or something else? Unless there's a specific issue, it seems like you could brainstorm about possible hobbies and then sign up for related courses in drawing, writing, yoga or whatever.
I guess I'm not getting why you need a consultant for reasons other than financial ones.