In San Diego buy n hold historically has provided outstanding return. 

I think the most useful aspects of a cap rate are 1) as a market comparison for your property, and 2) in a historical context to determine overall market strength.  

Rates are at historic lows. 

It's in a historic neighborhood so the small size is normal for the area but since it's just the two of us it's all the space we could need. 

Get the building's historical use of heating oil (in gallons).  

That said most markets there still appear overvalued >10% based on historical valuation (price/income ratios), its spike in part reflecting the housing shortage, though not fully.

I've hit a point in my career where my income is sufficient to live comfortably so I have begun focusing on growing personal revenue streams with my current salary as a benchmark +25% (I'm taking into account historical vacancy average in my market) So in essence if you make $10k gross per month the goal should be clearing $12,500 per month.

So I purchased a property that has a few historic district code violations.

Does anyone have any historical data related to appreciation of SFH vs smaller mulit-family units? 

@Russell BrazilI agree with Russell Investing in Real Estate is a long term play and utilizing leverage at these historically low rates are prime reasons why myself and other investors continue to purchase in this market.