[turbo6bar]

If humidity control is your primary concern, buy a whole house dehumidifier. Run it where you're gone. When you're back, turn on the A/C. A dehumidifier is a far more cost effective means of controlling humidity. An air conditioning unit is split roughly 70/30, with 70% of output removing heat from the house, and 30% of output, removing humidity (moisture via condensation at the evaporator coil). If you run the air conditioner enough to control the humidity, you will be throwing away a lot of energy cooling a house with no occupants.
jurgen