Multifamily zoned property ideas

[Anthony Mitchell]

My brother stays in a property zoned multifamily and has 4 basically huts on them. He lives in one and basically uses the other 3 for storage. 

I want to buy it if my mom decides to sell it. I was thinking of tearing down the huts and building 4 duplexes and aiming for 2 to be short term rentals and make the other 2 long term rentals. 

Does this sound like a good investment and can anyone recommend other strategies for the property?