If I did an FHA loan and paid little down, the mortgage payments would be insanely high right?

I'm was going to refinance my home from my mortgage company so I could do some home repair but I decided I don't want to I have not schedule a closing date but i have singed some paperwork how do I back out of it ?

Although I've gained some knowledge through reading books and online research, my experience in this area is limited.

Even if this means paying out of pocket to cover the mortgage/expenses.How long has the property been marketed?

(Max vacated rents - your monthly mortgage payment) = +/- net cashflow. 

How do I go about getting approved when I am already maxed out on getting another mortgage..? 

Prop 1 SFH: mortgage amount around $950, rented at $2175Prop 2 SFH: mortgage amount around $900, rented at $1725Prop 3 Duplex: mortgage amount around $1000, rented at $1400($700/side)Prop 4 L/O Duplex: mortgage around $800, rented at $1850($925/side)What would you do here?

In addition to my role in mortgage underwriting, I also own a duplex, which has significantly fueled my interest in the real estate sector.

My wife keeps telling me about a $0 down payment loan option that she’s been hearing about where if you can show that the rent will be greater than the mortgage, this type of loan will require $0 down or lower than the 20/25% requirement. 

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