The refinancing part is traditionally done with a bank. 

Hellocan anyone recommend a good Real Estate TurnKey solution to get into the Buy & Hold business for multi-family units?

The LLC that you own is a disqualified party, so it would be a prohibited transaction between the Solo 401k and that LLC. 

How do you approach the numbers/financials to a multi-unit when house hacking?  

I am very new to the realm of real estate so far I been thru just about 100 videos but no other form of education on R.E I believe I have the basic knowledge of R.E down pack but I know I have a lot more to learn and that is why I am here.

Holy smokes, this article/video should convince you pretty well that you shouldn't let your "passive income source" be too passive.Not everything should be delegated. 

To this date, the owner on the property record still shows "SECRETARY OF DEPARTMENT OF HOUSING AND URBAN DEVELOPMENT" as the owner even though the party I'm buying it from is Wells Fargo Bank.

I'm assuming that since I'm looking at an 8 unit multi, the banks would look at the net operating income to determine the ARV.  

Ive been reading and learning for months about multi family and buy and hold, and never thought my first deal might be a driving for dollars tax deed, so I am trying to educate myself a little more on the subject. 

Consider house Hacking or multi family for your first buy if you are thinking of being a real estate investor.