Ductless Mini Split System for Cooling, Heating, and Dehumidification
You need to do a heating/cooling load calculation on your building with its specific design and insulation. It's a lot more than just the dimensions of the building. For example you need the volume of the building so you need the ceiling height. 

Then select a make and model large enough to handle the load with the humidity option you require.

Asking for specific recommendations of make and model is considered off topic since it is asking for someone to shop for you.

Good luck!