Thanks for all the great comments and insight.
Aleks you mentioned something I did not know.
"Your cost will also be lower besides the fact you don't have MI you won't have the MI for the life of the loan like you will with FHA."
I assumed that I could make the MI go away once the loan was paid down to be 80% of the original loan value. I am going to have to look into this. Or if anyone reads this could you set me straight please?
So after looking at the numbers again it is not as good of a deal as I thought. Using the BP calculator and putting in mid range percentages for Vacancy, Cap EX & Repairs it looks like it will cash flow right about $200/month if I rent out both sides. However I forgot to take into account that if I move into one side, the money that should be set aside for upcoming costs does not change. So who puts that money in the account if it's not coming from the rent. Oh crap, I do.
At the end of the day if I live in one side then I will only be like $315 better off per month rather than $600. But still I will be banking some money, that when it goes to eventually pay for expenses, will be tax deductible.
So now the debate in my head is do I want to trade some lack of privacy for a modest financial gain? I know that it will be more than just the $315 a month because I will have an asset that I will be building equity in with the help of OP money but I have never shared a living space with a stranger before and I am not looking forward to it.