I have functioned in many different ways and could help you with many different ways if you can think of anyway I could do that.  

Having these conversations with the CPA as I converted my books has completely changed the way I think about my record keeping, how I take draws, how I may structure partnerships and investors going forward....Other than perhaps a good real estate lawyer, from my experience, a good CPA is critical to a young real estate investor's performance. 

Drive a functional beater to your first closing with pride.

This might be a new job to learn - I'm sure the search function here can bring some good wisdom that speaks to managing remotely. 

I have registered both a Corporation (taxed as an S Corp) and a LLC member managed (taxed as a partnership, since there are 2 of us in my buinsess) in my home state of Minnesota for the filing fee of $150 each. 

However, I was unable to find any authorities that would prohibit such a sale to a related LLC taxed as a partnership. 

Your post isn't entirely clear as to who "we" are, but you need either a partnership agreement or a promissory note/deed of trust agreement, either of which can be drawn up by an attorney based on the parameters you outline.  

Class B buildings should generally not be functionally obsolete and should be well maintained.Class C The lowest classification of building and space is Class C.

You CAN create a limited partnership and define the ownership as you please, but the members can not sell their share; if a member wants out, the others buy him/her out.When we say Shares, think Stock Exchange share which are governed by the SEC.When forming a legal entity, you would acquire the right to sell shares openly ONCE registered with the SEC. 

I am unsure of how to set up the partnership.