Yes, that's enough of a deposit to borrow another say $150k (unless you're really gung ho and want a ~95% primary mortgage), but then that brings into focus your DTI as it relates to how much income you'll derive out of your newly refinanced ~$335k investment loan - together with your yet-to-be-approved hefty new primary mortgage debt.For your sake, I hope you already have very good assured income. 

I can derive that my monthly payment on interest only would total to $750 (300,000 x .03)/12  What would be the simplest way to calculate monthly payment on interest and principal ? 

I can derive that my interest only payment would total to $750/month (300,000 x .03)/12What would be the simplest way to calculate monthly payment that combines interest and principal and pay it all off in 10 years ?

Sometimes out of stupidity, but often because they know cash is king....This is good overall for the state of AZ, raising property values and revenues derived thereof, but I think it would be tough for a native trying to get their first house.....

@Shafi NossThere is no magic formula as to how Congress derived these numbers decades ago when this was implemented into tax law.

I did not follow through with traditional financing because 75% of income is derived from a monthly military benefit and my business partner is a travel nurse/ contract worker so her W-2's don't reflect her true income.

Starting with a unshaded neighborhood map of Chicago and then shading each neighborhood manually one by one based on its derived cap rate.  

Along with that, my primary and only source of income is derived from driving Uber.

Yes cash flows were to derive sale price.

Derivatives, collateralized debt obligations, or whatever they wanted to call it when re-selling it.