Determine property value based upon rents ?

[Charles Artino]

I know all markets are different but is there an average rent ( or guide ) per door that should met in relationship to the price of a house so that your monthly mortgage payment can be made. For an example: a duplex rent in each unit $550 /month and they want $100k for the house. Is this a fair price ? Say a chart that says a $130k duplex each door the rent should be "X", a 130k triplex each door the rent should be "Y". Say the chart goes in $10k increments from $60k to $400k, single homes. duplexes, triplexes, quads, etc.., Utilities included (water, garbage,...,), Utilities not included.  How much rent per door ? Thanks in advance