Aircon for boiling hot shop

Hi!

I have just started a little home industry and did not bargain on the shop being so hot! Imagine walking into a shop and everything you touch is cooking! I barely have to boil my kettle (its not THAT bad, but, I do have alot of luke warm water).

I cannot currently afford an aircon, but would love and appreciate one with more than what my heart can give.

Please help me out, so that I can keep beautifully iced cakes in my shop and make so many people, young and old, happy with delightful treats. :)