My only suggestion for cooling is to have about 2x as much A/C capacity as you think you need.. the compressors in home A/C units are not designed to run 24/7 cooling servers.. they tend to wear out a lot more quickly if they arn't allowed to cycle hourly.. a pair of units is probably the best solution. You might look into split units, where the compressor sits outside, and the heat exchanger is a wall-mount unit. spot coolers are also a good solution.