Advantages of Commercial over Residential -- Feedback Requested

[Louis A.]

Hello Fellow BP Gurus! As the subject suggests, I'm trying to determine whether to dip my feet into Commercial. I've gone back and forth with the debate -- At the end of the day, I have ultimately stayed on the residential side. 

As background: I have 4 multi-unit properties, each with 4 units or less.
I would consider them all to be "B" grade properties with very decent / respectable returns.
What I love most is that they all qualify for Freddie/Fanny financing -- Rates are incredibly low and I love the long-term predictability cash-flow requirements for a 30 year fixed mortgage. It also helps me achieve one of my goals .... 20% or higher Cash on Cash returns. 

I understand that Cap rates can be a bit more attractive for commercial. What scares me the most however are the limited term loans (often 5 years) that are based on a 20 year amortization schedule -- Also, the relative uncertainty of being at the mercy of what the prevailing rates are when it comes time to refinance is a bit hard to stomach for me.

So many here are proponents of Commercial, and I trust for good reason. Clearly many of you have overcome what I perceive to be sticking points .... I'm interested with how you all have done so. Perhaps there are other reasons which I've not contemplated -- Appreciate your feedback there too.

All the best and thank you all in the advance for your feedback!