If someone want's to take charge and "officially" organize it there looks to be interest in attending in Lincoln.

Half the time they can't even tell if it's legal or not, I get that "well they bought it as one".I would be open to and very happy to receive any criticism or objections that you think would help me better serve this niche!

Not trying to be negative - trying to help you anticipate questions/objections he may have when you propose to him your offer. 

And DIG has subgroups as well, where meetings are held throughout the area and are either focused on a specific topic or organized geographically for a more localized flavor  There might be other "meet ups" nearby, but I suspect that you will not find those to have same depth and breadth of knowledge and experience as what you will find at DIG; I could be wrong about that of course ...  

I want to create a nonprofit organization in which I'd be purchasing vacant and condemned housing, rehabbing them,  and renting them or offering for sale or rent to own.  

How should I go about organizing assets and liabilities into different cells?

Would I have to pay $100/more a month to be apart of an organization?

Sec. 207a.(1) ...A certificate of good standing issued to a domestic limited liability company shall state that it has been validly organized as a domestic limited liability company, that it is validly in existence under the laws of this state, and that it has satisfied its annual filing obligations.(2) If a domestic limited liability company or a foreign limited liability company authorized to transact business in this state fails to file an annual statement required by section 207 for 2 consecutive years, the administrator shall notify the company of the consequences of the failure to file under subsection (3).(3) If a limited liability company does not file all annual statements it has failed to file, and the applicable fees, within 60 days after the administrator's notice under subsection (2) is sent, the limited liability company is not in good standing."

I am planning to organize another Investor's Happy Hour in early February.  

I do know the sellers, so of course have talked with them, but I wanted to also get a more objective and investor oriented perspective.