Your range is accurate, really depends on the condition

You want more money coming in than going out; the big trick is knowing how to keep track of what's going out (there are a lot of ways) to be sure you're getting an accurate picture.

Either way, you'll need to have your repairs numbers laser accurate.

I think that cash/cash (NOI / DP [down payment]) is more accurate of MY investment in cash.

Knowing the ARV accurately.

Homewyse strongly recommends that you contact reputable professionals for an accurate assessment of work required and costs for your project - before making any decisions or commitments."

Looked up the house on Zillow, info is lacking, shows it was pulled a few month ago, not accurate according to MLS.

The water furnace for both homes is in the garage behind this house.Zillow listing for 1424 sq feet2) 2 bedroom and 1 bath (1,424 sq feet which I don't think is accurate): Needs a lot of work but it is salvageable. 

Once you've figured out what the ARV is on the house, you'll need to accurately estimate how much the repairs will cost to present to your potential buyers.

My wife does an excellent job of tracking these things so it will be interesting to look back and see how accurate we believe we are. figures don't lie, but liars figure