My concern is that my DTI may be negatively effected if I refi my primary 1st.

Lets regulate housing more when you know that things like rent control have negative effects. 

That it has a strong "base case" cash flow from the house-hack, and that it has multiple avenues for material upside, combinining live in flip and house-hack concepts. 

There are many RE books that usually cover a single RE investment concept.  

@Luis Astudillo - I understand and I'm clear on the prepayment concept in the context of refinancing the loan or selling the property and squashing the entire loan balance.

Wait and negative cash flow turns positive.  

What are peoples' positive and negative experience with them?

So far, I haven't received any negative feedback about these choices.

I think the most interesting part of the DSCR loans is that they are actually going negative on the DSCR, for example I have 2 lenders that will go below 1.04.

So my cautionary tale is when buying seller financed paper, make sure you are very in tune to the value of the property.PS: Even if this started out as performing, same concept applies - make sure you know the numbers/values of the property.