sgillum71, please reread my last post and take heed. Whoever told you that running electrical that far is expensive is correct due to what I stated above about the size wire needed. Ted and Carey are in the business and will tell you that Running air vs electricity is far more economical, practical, and less dangerous. I also mentioned that instead of the garage, you can put it a ways from the house in a sound deadened box with a cooling fan.
If you are even considering a fountain, the current draw so the wire size would be even more.
5 amps current requires 14 gauge wire for 100ft, 4 gauge at 1200 ft. Look up the price of 4 ga. 3 conductor wire and conduit needed to go under the cultivated field. Just dont want you to make a huge mistake.