@Trevor Ewen  I'm sure it's just me but as a buy&hold investor, I'm focused on the performance numbers of the property and not concerned at all regarding tenants. 

When posted the question,  I was more concerned with how easy/difficult it would be to secure conventional loans after having multiple mortgages.  

How exactly are you planning to operate your investing that those should ever be a concern?

You will often have to offer a higher price if you're competing with a conventionally financed buyer for the same property as seasoned agents know the issues that accompany and FHA loan.  

The LLC is going to be a disregarded entity, so as far as the IRS is concerned, it is still your primary residence.

However, I'm concerned that (1) homeowners will perceive me as a self-interested investor and (2) when I get them on the phone, they will only want to know my buying price, not allowing me to build a relationship.B.

Some buyers are scared of these type of houses no matter what you do; some want to see the extent of the damage via "before" pictures and what was done to correct the issue, with description from the remediation company accompanied by a certificate with the "after" pictures.

With that said you appear to be more concerned about protection from the value of your property going down.  

Get information for all parties concerned.

That said, I read as much chatter as yesterday's schedule would allow concerning the Fed's rate increase.