203K loan using house flipping calculator

[Daniel Adams]

All,

Quick question. 

I plan to purchase a live in flip via a 203K loan here shortly. I am trying to maximize the use of the house flipping calculator to determine the purchase price. I insert 720 days (2 years) and it comes out to a low number the seller isn't going to accept.

How do I account for the value of my mortgage payments throughout those 2 years? Do I look at the return on Investment for flip? Or try to calculate a value for refinancing down the road?

Thanks so much!

For example purposes:

After repair value: $300,000

Rehab: $20,000

Profit: $50,000

Purchase Price: $158,000.

MLS listing/asking price: $239,900