About a decade ago here, roomers were brought under the umbrella of the tenancy act and fall under the same basic lease as tenant with the following exception that there is no expectation of privacy in common areas (landlord may enter at will) and, if cleaning services are provided, landlord may enter rooms w/o notice to provide those services.That said, we have some additional house rules at our student rooming houses:- everyone is collectively responsible for cleaning common areas where we do not provide the service.  

There is no due-on-sale trigger, there is no city/state transfer tax, there is asset protection (at least some privacy), and no liens that may become attached to that property will affect anyone or any other property owned outside of that trust.Remember the KISS formula:  keep it simple...

It's not about looking suspicious; it's about liberty, freedom, privacy and property rights.

What are the factors about your home that will push it higher up the range (big lot, privacy....) and are there any negatives that will pull it lower (only 2 brms, under 2000sf etc).

There can be a couple reasons to not have it in your name but those are mostly related to privacy or estate planning and are only applicable in certain particular situations.

If you want to get fancy and remove your name from public record to provide more privacy you would need an attorney's assistance, but some investors find it a valuable investment.

With such a home, I can get both privacy and rental income too.

The more comfortable you want to be (duplex means you still have privacy) it is harder to find a deal and you may not be as profitable if you were just get a very large house and rent out buy the room.

This is probably a stupid question, but what is a privacy dispute? 

I think split foyer is the best style to keep each privacy (There looks not so many supply in the market in Maryland though).For me, there looks some areas I should consider and they have pros and cons.