I can’t imagine a traditional lender allowing you to change the holder from you to an LLC.

If you're worried about your primary lender knowing, and she's okay with it, you could do a unrecorded second (more risk for her).  

My wife and I are moving into one of our apartments (4 plex) and I'm wondering if, because we will be living there as a primary residence, are we exempt from any of the renting laws?

Keep in mind in my case I have an 800 credit score, two rentals, and a primary home if that changes anything from the banks point of view.

Yes you're supposed to live at the property for at least one year as your primary residence which means at least 51% of the time. 

I don’t think this would get the tax breaks you get for a primary residence

A portfolio lender with their own money can do whatever they want but you'll pay more for it. 7% is high, but if you hold that long enough you could then rate and term with more traditional financing later.

My full time job has a non traditional schedule and I have several days a week off which allows me enough time to be an effective agent even though I'm part time. 

My question is around purchasing the next home and moving into it as my primary residence.

What strategy is this...a slow flip that you are living in, a traditional rehab and sell, your primary residence you intend to inhabit forever?