First I ask for the landlords where tenant has resided in my application; I go back at least five years, and if that does not get at least two landlords then I ask for a previous landlord.

I have 4 investment properties and bought my primary residence as an REO also. 

You didn't ask but to confirm - yes you can combine sec 121 primary residence exclusion and a 1031 exchange to complete eliminate and defer all tax on gain from the sale - a great strategy. 

I have been selling off free and clear single-family residences and carrying the financing.

One of my buddies and I are looking to get into Real Estate Investing and have come across many articles and advice on starting out with a live-in duplex as an investment property that can be financed using an FHA loan and eventually rented out after a year of living in. 

Can anyone recommend an inspector for brand new primary residence that is just built by well known construction company.

@Dan Krupa I'm looking at pulling equity out of my main residence and we should have +$150k.

I would look at your entire commercial portfolio separately from your primary residence.

How does a mortgage on a investment property effect the likelihood of acquiring an additional mortgage for a primary residence. 

"Do you cap the number of financed properties I can have, if I am buying a primary residence?"