So the idea is to put the investment SFH into the LLC to (a) Limit liability to the LLC and investment SFH only, and (b) To deduct expenses and take advantage of depreciation. 

@Andy ChenThis is a common practice where investors take advantage of the lower residential rate.  

If you keep it as a rental you get the benefit of appreciation, equity build-up, tax advantages, income, etc.  

The "classic" argument of where agents have some sort of unfair advantage or are looked on as doing something sneaky supposedly can come into play. 

Do plan on living in one unit and renting out the other unit.Plan on taking advantage of these low rates

From there you handle everything, but have the advantage to defer back to them if you need help or advice for a fee.This inst a turnoff to potential tenants that are going to be any good, and an advantage to you because the management company will already have vetting procedures, background check in place, etc. to get you a good tenant.

Way to use it to your advantage. 

should i be taking advantage of nsp etc ?

They will be much more likely to want to take advantage of you if they know you came in to a bunch of money.

Let's add another 6K a month from current 4 properties between increased rents (cash flow and principal pay down) and I'm looking at 15K a month between cash flow and principal pay down (I consider PPD a form of tax advantaged savings).