Install Ductless Mini Split AC?

[Kevin Phu]

I'm considering having ductless mini split AC installed in my 4br2ba SFR (house hacking primary residence). I live in SoCal and although it doesn't get extremely hot at the house, there are definitely a lot of times I wish the house had AC. The cross breeze doesn't do well with cooling the house down. What are the downsides? How much do value does an air conditioning system add to the home's worth?