I see it as two different ways of calculating this:1. considered personal use days when not booked method: 200 rental use days / (200 rental use days + 165 personal use days) = 55% and multiply that by 25% (sq ft) = 14% prorationOR2. no personal days for dedicated unit method: 200 rental use days / (200 rental use days + 0 personal use days) = 100% multiplied by 25% = 25% prorationSince the ADU is solely for renting and is never used personally I would think method 2 makes sense?

Leverage is a force multiplier: It can move a project along quickly and increase returns if things are going well, but if a project’s loans are under stress – typically when its return on assets isn’t enough to cover interest payments – investors tend to lose quickly and a lot.As a general rule, leverage should not exceed 75% of the total property value, including mezzanine and preferred equity, because both of these types of debt sit ahead of common equity in payment order.

Multiply 2,500 by .02 and you will get 50.

For the people trying to get to that level, though, in the so called growth phase of their wealth building strategy, leverage is a powerful powerful multiplier.

I would account for 70-80% of purchase price multiplied by the tax rate for the following year just to be safe. 

  $40,000 in equity (25%) will stay in the property.You are using the wrong numbers to multiply (Purchase price and Rehab cost do not determine the Refinance loan amount). 

In the book, I can't remember who said this, but he said you should multiply your goal by 10 and that is your new goal. 

@Joe Johnson Maybe before anything you should define what you consider ROI and how you calculate it - this is how I do it:Cash Flow = Annual Income (or Monthly Rent x 12) – Vacancy (or Monthly Rent x 12 x Annual Vacancy Percentage) – Operating Expenses – Mortgage Payments (or Property Price minus Down Payment, all multiplied with Loan Factor times 12)Cash on Cash Return on Investment = Cash Flow / (Down Payment + Closing Costs)1.

I know BP has their own calculator and methods but what we do is just build in a 15% of gross rent multiplier that encompasses capEx, vacancy, deferred maintenance, etc.

If you plan to rent the approach to value that you need is the income approach with rent multiplied by a gross rent multiplier.