It creates potential for two-layer taxation and creates tax deductibility issues for losses. 

Hello everyone, I have been a "silent reader" of this great community, and appreciating every single post. However, I haven't run across the following topics. Hopefully someone with knowledge would shed some light:1. ...

I guess each buyer will have to determine for themselves whether or not the LLC is financially beneficial based on the savings and benefits the LLC could provide them versus any taxation drawbacks.

We own 3 units currently.I am realizing that there are some advantages to the Solo 401K (yes I qualify) such as not having UDFI taxation when borrowing which I intend to do along with much higher contribution limits.

The Roth portion of another qualified employer plan like a 401k, 403n, etc can be rolled over into the Roth portion of a Solo 401k.The solo 401k does provide the ability to do an in-plan conversion of tax-deferred funds to Roth status (with the corresponding tax implications), and allows for generous new Roth contributions up to $18K per year.A Solo 401k is exempted from Unrelated Debt Financed income taxation (UDFI) when using mortgages to acquire real property.  

LLCs are not recognized by the CRA and are liable for double taxation.  

If you flip on a regular basis (vague term that gives the IRS flexibility to determine if you are materially competing with taxpaying businesses), then UBIT would apply.There is no regular taxation to the IRA, so no income or self-employment tax.  

First, one of the side-effects of owning RE is ability to control and alleviate exposure to taxation (talk to Brandon about that).

Then I'm looking on my states assessments and taxation website to see who purchased the house.

Real estate taxation is a vast topic, and it can take countless hours if you get into podcasts and blogs.