TN Visa for Management Consultant

First, so glad to find this site, very informative.

However, I have some specifics. I work in pro sports and at one point had an H1-B which was never activited due to the company I was hired for reneging on their contract to me (long story) that was over 4 years ago.

I have the potential that another sports business company my want to offer me a position as Management Consultant. So here are my questions

1) will my prior Visa status have an affect on a TN Application
2) I am reading that the Management Consultant is a tougher one to be approved for, I dont have a degree but 3 years of college plus 10 years experience with 4 on the management level and 1 on the director level with sports teams and sport events. Will this be enough?
3) I am freelance right now, if I get the job, can I work for that company directly or do I have to be employed by a canadian based company as the employee
4) When I go for the TN visa, if approved, do I have to immediately go to the US and begin my work or can I turn around and come back and leave at a later date (like a few days later).
5) What are the entry/exit rules on a TN visa and are there limitations on the amount of times I can cross the border over the year of TN status
6) Where is the best POE to get the TN and most likely to have the highest rate of approval

Appreciate anyone taking the time to read and respond to my lengthy questions.

1) No.
2) Management consultant really means that from what I've read, i.e. you work for a professional management company that sends consultants to companies to sort out their management, in your case you would work for a professional sports management company that employees people to work as consultants in management for sports events, essentially. Or be self-employed and specifically do the job of a management consultant. You can't just be someone who has a job that has something to do with management who is giving them a bit of advice.
3) You have to get the letter from a US employer, they can specify you as employee of such and such a company or you as someone on your own but the key point is they must be a US employer who wants you specifically.
4) It's ten days maximum prior for visas, but TN-1 is not a visa, it's an entry category, so it's kind of vague.
5) You can cross as many times as you want, TN-1 requires "bona fide non-immigrant intent" so by definition it would not surprise them to see you leave frequently. Just make sure you don't hand over your I-94 to some halfwit airline employee.
6) No idea.