However then that idea was questioned by someone else who thought that separate LLCs were not nesc. in order to protect the properties from each other and maybe using a DBA(s) accomplish this?

From your own perspective, you have to ask yourself what are the short medium and long term goals you want RE to accomplish for you.

In the middle sized complexes you don't accomplish either.

Which I have no problem because ultimately I wish to build a buy and hold portfolio.Since I'm already pre-approved for 200k I want to find every possible way this opportunity can shoot me towards the beginning of my investing career so from reading and networking I have a specific strategy to pursue the problem I'm having is finding out if what I wish to accomplish is legal because I've been running into many opinions about the matter.

I have a lot of due diligence to accomplish since this is a new market for me. 

Trouble with long-time entrenched owners (and tenants) is that they are often delusional about what they can accomplish.  

Note "investing" is and must be accomplished with your own money, not even with borrowed funds un a commercial arena, and holding that investment as may be reasonable to earn interest.

This trip can't be accomplished without the same care and due diligence, planning, training and preparations.

I know I will probably have a few questions as I try to accomplish my goals for 2015. 

When people obsess over the easy stuff, it generally means they're avoiding focusing on the hard stuff; and those who avoid focusing on the hard stuff, never accomplish the hard stuff.