[Calc Review] Help me analyze this deal

[Daniel Hargraves]

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Hey fellow investors.  Im analyzing a self build and having a hard time understanding the analysis overtime.  It seems to be using the 50% rule to determine the annual cash flow. First of all.  I dont understand the 50% rule.  It shows a monthly cash flow of $230 after refinacing.  But the charts at the bottom of the analysis dont reflect this.  Showing instead an annual cash flow of -$8964.

Please help me understand.  I would like to present this to an investor and to the bank.  And i would like to understand what it means before i do. Thanks in advance.

*This link comes directly from our calculators, based on information input by the member who posted.