I live a relatively minimalistic life with little debt (minus my mortgage) I am on bigger pockets exploring how to keep the real estate ball rolling!

The bigger pockets community never ceases to amaze me.

They rolled him in his underwear onto the bag and places him on a gurney, then carted him out the door to the ambulance. 

My 'roll over' amounts were MUCH larger than my contributions since I switched over, as is often the case I think.

I recently heard about rolling over what’s left into a SD-IRA.

they require a low 1.0 debt coverage ratio so as long as your rents cover PITIA expenses then your good to go, cash out is required to be used for "business purposes" only their retail division is Cash Call mortgage, FICO can be as low as 600 and cash out LTV's from 65-75% based on credit, I used to work for IMPAC as they were rolling out the product, it is pretty competitive in the market for this type of financing. 

Do you prefer to A. prefer to pay themB. roll them into loan (if that is available commercial loan example)

You've got experience, a little tax free cash in your pocket (or on your balance sheet), maybe some good connections with subs, and then you are ready to roll again. 

I am fairly new and still trying to get the ball rolling with REI.

I would suggest biding your time, concentrate on your education, get your degree, starting bankrolling some cash, and be ready to rock & roll a few years down the track.