My question is by doing this and making my primary residence one of the units am I required to pay 20% or 5% down?

A few quick data points for you:1) In order to do a VA IRRRL (which is still a VA loan), you must have a minimum of 210 days from the date of the first payment on the first VA loan to the new note date (i.e. closing date of the IRRRL).2) A minimum of 6 months consecutive payments must be made on the original VA loan.I'd first look to see if you have any VA entitlement left following the 4-plex purchase... if not, perhaps consider a refinance to an FHA loan while it's still your primary residence (loan amount can be up to 97.75% of the value of the property if it's a rate/term refinance) in order to reuse your VA entitlement for another purchase down the road.

As far as timelines, I put down 5% on my residence and it didn’t take any longer than any other conventional loan.

I am getting HELOCs on my primary residence and a rental property, that my husband and I own under our names.

The podcasts, forums & ability to network have been greatly helpful in enhancing my knowledge.

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?

He wants to keep his residence in the family and intends to put it into a revocable trust. 

Personal residence.

I have $50,000 to invest in real estate.Question is: What if I rented out my personal residence for at least the next 3 years?

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.