Some folks use a master LLC with subsidiary series LLC's.

Our firm offers not only assistance in buying but property management through our subsidiary.  

Trust with LLC subsidiaries?

However, big companies often use these same methods to save tax dollars (think: being a CEO of a company, being paid to your personal Cayman account by the company's offshore subsidiary, and not reporting a cent).For example, a US citizen could open a offshore entity and just get paid to it.

If it IS better to separate, is there a way to get it so that you have a parent company owning two subsidiary LLC and only have to file one consolidated group tax return? 

The structure I have is an LLC holding company that owns subsidiary LLC's.

I was talking about the same thing, going to the US subsidiary of the Canadian banks.The loan will be amortized over 20 - 30 years but the problem is that, like in Giuseppe’s CIBC example, the rate is fixed for max 10 years and today it’s max 5 years as far as I know.

As I previously wrote, the guidance is the same as I found at the other five underwriters I worked at.First American is either the largest or second largest title insurer by premium dollars in the US (it changes from year to year depending on how Fidelity National Title and its subsidiaries does).Factors to be taken into consideration by title insurance examiners and underwriters in connection with LLCs are the relevant state statute(s), the articles of organization and the operating agreement of the LLC, and an analogy to partnership and corporation law.

A US company would probably have to set up a subsidiary or foreign entity in Canada.

Sublease and Assignment.Tenant shall have the right without Landlord’s consent, to assign this Lease to a corporation with which Tenant may merge or consolidate, to any subsidiary of Tenant, to any corporation under common control with Tenant, or to a purchaser of substantially all of Tenant’s assets.