best cities now for multi-family investment

[Mike Xiao]

I currently have a home in Tooele, UT.  It's paid off, but I'm wanting to sell it, and take that money to use towards the down payment of a multi-family property. After everything, I think I might have $150K-$200K to put down. 

I live in San Diego, and the market here is just sky high. 

I'd like to know which cities in the US are good investment options now, and why.

Preferably an area where the cost for permits to build new buildings is high.....as to keep away new developers from diluting the market.

Thanks!