They provide a "resident score" which is their proprietary calculation they've come up with similar to a credit score but apparently it's more robust and comprehensive.

In addition to appreciation potential, there are a bunch of tax benefits to consider as well... my favorite being that a tax loss can be carried forward to offset future taxable income.

Many places followed this with some excluding babies from the calculation.

This is calculating a return rate of 8% (inflation taken into account).I might be a little bit more risk averse.

Per this NY Times article, the average American knows around 600 people.https://www.nytimes.com/2013/02/19/science/the-average-american-knows-how-many-people.html#:~:text=The%20average%20American%20knows%20about,do%20you%20know%20named%20Kevin%3FPer the US Census Bureau, the average American moves 11.7 time in their life, which based upon an approximate lifespan of 84 years, works out to be about every 7 years.https://www.census.gov/topics/population/migration/guidance/calculating-migration-expectancy.html#:~:text=Using%202007%20ACS%20data%2C%20it,one%20move%20per%20single%20yearSo, if the average American knows 600 people and they each move about every 7 years, that means that the average American knows around 85 people that move in any given year.How many of those moves do you want to be involved in?

Moral of the story investor used the calculator and beat me down and well I will not discuss how much money I'm loosing on this project. 

Alternatively there are also asset based lenders that do not require DSCR calculation or income verification, that can be less costly than hard money, and fully amortizing.

When you turn a personal residence into a rental, you want to make sure you calculate your basis properly.Your basis will be purchase price + improvements made to the house since time of purchase(Assuming the FMV at time of conversion is atleast this amount).Best of luck!

If you are purchasing in cash, you need to basically do the calculations if it is worth it walk out now and lose the deposit or take the house as is and fix up what is needed.

You can read books about estimating and find calculators online, but the best way is just to do a couple projects and see how well you are doing.