I've heard of similar responses, but I believe that if you're in a busy fellowship, and you want to get things off the ground upon completion of your fellowship, it would be much less painful having a practice management consultant help you out. Of course, the price of a consultant varies much, and I'm not sure if it's worth getting a consultant with a big reputation that will charge a much higher price.
I think the biggest step to starting a practice is to establish a referral base first...otherwise, the overhead costs could dig a deep hole in your pocket while your practice is building up.
I'm also in fellowship, and am considering the same things you are...so this is coming from little experience....just word of mouth.