Start small, say apartments or condos.

I figured that would need to be a part of the closing to remove that deed of trust prior to new ownership.

However, you would have to rework your current contract to be subject to SS approval  (which the buyer may or may not be into),or sell to another party, and if you are getting financing for the new house, that will likely fall apart as well. 

@Rachel Chioreanu unless your project is an apartment building or Class A SFR, a GC is usually a waste of money.What you probably really need is a Project Manager from a GREAT property management company.What's the scope of your project?

I am in the middle of closing on a mid-sized apartment deal in Mcallen, Texas.

It was the perfect solution for this home considering it's location only a few miles from the University of Houston, Texas Southern Univ., VA hospital, Texas Medical Center, Downtown Houston, Toyota Center, Reliant Stadium as well as Hwy 45, 59, 288 and 610.

Hello I’m looking for information regarding turning an unfinished basement to a legal apartment in a current 2 family.

There are rumblings that over the next year or two more apartment buildings may come available.

I don't know that Crexi has any information on the owners, just data on multi and apartments.

Quote from @Bradley Hendrix: Looking to get a cost segregation done on my 24-unit apartment building I just completely remodeled.