That sort of implies a one size fits all loans approach to disposition and nothing could be further from the truth.  

I graduated from East Tennessee State University with a degree in business management and am currently employed and working as the third generation of a family business that my grandfather started in the 1960s.

However, I have not had stable employment for the past two years, but have worked/held internships every summer and winter since starting college (September 2012).

I have done some decent size deals, and the bigger the deal, generally the longer it takes to get done.  

I see surrounding market range with similar size is 200k -239k

The size of the house is pretty decent but it is a lot of work.  

If it's a decent sized multifamily and if you haven't raised the rent 50% in the past three years, but basically maintained them then I would probably use some equity to buy another well cash flowing property.

You mentioned building credit, that and steady verifiable employment are important if you plan on using bank financing. 

At this point, I'm not even sure what size facility to build.

Since each solo 401k participant can borrow up to 50% of their respective solo 401k balance not to exceed $50,000, if your husband is also self employed and has funds that he can transfer to the solo 401k, he can also borrow from the solo 401k.