For example I know Dallas in particular has a specific zoning for duplex's outside of the single family distinction. 

You've got a slew of interconnected but distinct issues to deal with...The simple answer is no he has no right to come on the property simply by virtue of being married.

Some quick googling seems to indicate that an Operating Agreement is necessary documentation to prove that the LLC is a distinct entity from the member, even if it's a sole member LLC.

I apparently was not certain what the distinction was between the two. 

Ken: You can distribute dividends to adult children from your family trust and they will be grossed-up, credited and included at the child's marginal tax rate, but dividends to minor children are still subject to the "Kiddie Tax" ... you could also achieve this directly from a corporation by issuing distinct classes of shares to each family member and only declaring dividends on those classes held by the adult children.

I remember distinctly telling him that I have met a lot of ------------s in my life.

The valuation and market value of a multi family property differs from a single family and you want someone that understands the distinctions if you go that route.

That is clearly distinct from any type of professional lender.  

The distinction is in what type of unit amenities they provide meaning; private yard, private garage, no shared drive etc.

@steven_johnson - a few distinct differences between 203k and construction/rehab loans.203k financing is for owner occupied only.