I've tried calling on a few brokers in that area to see if they would know and I haven't found anyone who knew let alone some who didn't know what a cap rate was, its a little disappointing but I won't stop unit I get it. by the way I know how to calculate a cap rate for a particular property(NOI/value) I'm particularly looking for the "Market cap"?

How does one use the Rental Property Calculator if the duplex you are researching has two addresses and you're looking to evaluate the property as a whole? 

View report*This link comes directly from our calculators, based on information input by the member who posted.Hi All.

Apparently, I've used the BP calculators too many times in the past and can't use them anymore.

Calculating an ARV seems to be an easier task, because I can evaluate the sale prices of similar properties in the area, with respect to size, quality and location.However, estimating rehab costs is difficult.

View report*This link comes directly from our calculators, based on information input by the member who posted.

Won't the estimated value of the rents be calculated towards the monthly mortgage? 

CAP rate vs ROI : https://www.stessa.com/blog/ca...This site uses 50% rule for operating expenses, I've also seen 30-35% used - use your own judgement when calculating, depends on several factors like age of property, type of tenants, weather/location, etc.

I very interested in investing, but every time when I was checking properties here Seattle and I use ROI calculator my ROI ends up negative, so the only hope to enquire more properties was to buy one hope to refinance one day...

This is exactly the type of calculation I'm doing at the moment.