Rates won’t be as great compared with conventional/personal mortgage, but may help satisfy you both.

The rents are way too low compared to the price of real estate for buy and hold investing. 

I'm looking for a a calculator, app, or spreadsheet  that can be used to compare whether or not it's worth holding a property for a year to reduced Cap. gains tax or to sell. 

I wrote the above for informational purposes.

@Jeff Lehman just to be safe and for accounting purposes you should keep track of the interest and upon the tenant moving out disburse any interest to the tenant.

The minute I put a REAL (not wholetail) DEAL under contract I would reach out to each of them with a PDF presenting the property, the comparable sales within 0.25mi, pictures, and a full rehab estimate from my contractor.

It’s a bit complicated at first but believe me it’s nothing compare to medical school :) Feel free to message me, I can tell you much more.

So other than rental comps realtor provided, where has everyone found comparable rents? 

I own 64% and he owns 36%.The original mortgage was for $1.5M, but we did a refinance cash out (interestonly this time with the same mortgage payments as previous) and took $1M out last year.For argument purposes, let's say net sales proceeds are $7.5M, and our equityafter mortgage close out is $5M. 

.- Other than google searching comparable rentals, is there any way you all accurately project rents as well as vacancies for your areas?