You may have to adjust it slightly depending on the situation... a 3 bed 2 bath single family will probably rent for a little bit more than a 3 bed 2 bath side of a duplex, but it’s definitely close enough to run basic numbers and decide whether it’s worth investigating further.

. - Noon) and have been making adjustments and revising my "scripts" accordingly.  

I will adjust my calculations.Management will be closer to 10%.

Also, make sure you are adjusting the property taxes to 80-90% of the purchase price because the banks will do this in their underwriting.

I'd like to be able to put in amortization schedule (term), rate, down payment, monthly payment adjusted to a fixed point, and get proper accruals of principal and interest by month and year.

You should expect either a balloon or rate adjustment after 5 or 10 years.What's the local cap rate for similar class properties?

40k you may find something, anything under 40k and I think you should adjust strategy.ask fellow investors in your town and spend a lot of time talking to local bankers. 

@Matthew Paul I used to be a claims adjuster and would use my estimates to negotiate with contractors.

It does not make adjustments for natural neighborhood breaks.As someone new, the key is to learn the area you want to invest in. 

A traditional adjustable-rate mortgage at prime – 0.75% has a payment of $1,210.It requires a payment of just $918, almost $300 less each month.