Some non-institutional investors use ROI as their preferred measurement, in many cases because calculating IRR is a more complicated calculation.

Location (judicial vs. non-judicial)? 

Spreading myself too thin would make things a little more complicated and could potentially push my goals farther down the road than I would like.

- if the 1st has been as well, see when the Lis Pendens or Trustee appointment/transfer was  filed (Judicial or Non Judicial respectively, not sure what HI is) on the 1st. 

To make matters more complicated you are not familiar with the market in this new city other than the basics like, crime stats, average home cost, average rental rate, job growth, pop. growth, etc.

To make matters more complicated you are not familiar with the market in this new city other than the basics like, crime stats, average home cost, average rental rate, job growth, pop. growth, etc.

I live in NJ, and a Google search showed me that there is procuring cause here that might complicate things.

If so, that could complicate things.If it is worth $85K as is and she can afford to live there and is happy, then I'd just leave her, especially if siblings are involved. 

So, if you want to ensure that you have positive cash flow, you need to ensure that your monthly loan payment is less than this monthly NI amount.There are more complicated ways of determining whether you'll have positive cash flow (stemming from positive leverage) using the cap rate of the property and the loan constant for your loan, but the above is the easiest way to start.

Streamline yourself so you don't complicate your life.