4 unit multifamily deal

[Elvin Luccon]

Hi. I wanted to ask if this is a smart move. 

I am just starting and I want to own a 4-unit multifamily in Los Angeles, CA. This will be an expensive purchase. I plan to put 50% down to get some positive cash flow on the property and to save long-term on the interest. The numbers will not work if I get more than 4 units with a higher interest being a commercial loan that could put me on a much risky side. At this point, because property valuation is already too high I do not foresee that I could pull out any equity for this in the next 3 years for another property. The goal is to pay this off eventually and use cash flow to save for the next property. Does this purchase sound reasonable? I feel times have changed and what worked before will not work today, especially in areas like Los Angeles. Any advice would be much appreciated.