It could work if he investes enough in offshore managers, so that he is no longer part of the company. The, he would be around the PE problem. Then, he only has to ensure that he does not violate CFC rules with the offshore company. Could work, yes. Advantages over the US LLC, none. But it still would be in the jurisdiction he does not want and probably cost him more than he wanted.It's not like he is managing the offshore company from Canada pretending to not be tax resident in Canada.
His offshore company will form an EPC to do business where he lives.
He will do business throught the EPC.
The day to day activities will be performed by him in Canada.
The fact that he "unfortunately" doesn't have many clients in Canada isn't his fault!
But I like the idea. Please keep us posted if you can get this working, I will be moving to Montréal for good.