[Calc Review] Help me analyze this deal

[Michael Becze]

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

I'm purchasing my father's home for zero down. I'm going to take over payments. I am planning on converting the house into a duplex. For this I will need to take out a construction loan. After the conversion I would like to refinance the house to cover the cost of the construction loan and give the remainder to my father. I will keep the rents going forward. I'm meeting with contractors next week to figure our some cost quotes. The numbers I've plugged into the tool are my best estimates using some online research. I'm just not sure if I'm using the tool correctly and if the data makes sense. I'm trying to avoid garbage in, garbage out. Thank you for your time!