I have reached the point to start actively looking for my first multi family to house hack (live in one unit).

I'm actively looking to buy a park myself.

There's a bunch of other FB investment groups in Indy but these are the most active ones.

Are you looking to do passive investments or active? 

He will be actively restoring the house while living in one side (construction is in his wheelhouse).The seller: Seller owns the house, there is no mortgage.

I am trying to find out if I can somehow use Roth IRA money to some how finance REI activities without all the fees and fines associated with early withdraws. 

Don't tell them about your off-market/wholesale activities.

I finally made it my mission to be active in the forums for this year. 

A typically rental may show a small loss (depends upon scale).Look at using an IRA for her as well based upon your earnings; however, there are not too many options if she does not have any active earned income.

I rented it while I was gone.Now, I'm actively SHOPPING for my first rental and I've been using the calculator ad nauseum.My first of many questions is this: which criteria do you all hold as the MOST important when crunching numbers?