Peltier cooling is terribly inefficient you put in 100W of electricity you get 50W of heat removal from the source at 10 degrees celsius difference. So now you need to cool 100+50= 150W of heat. Also you cannot cool any modern graphic chip with 100W peltier (the chinese cheap peltiers you find on ebay are marketed by their electric consumption watts). This thing scales up as terribly inefficient. http://www.customthermoelectric.com/tecs/pdf/19911-5M31-28CZ_spec_sht.pdf
just look at that graph you find bottom left. It can move 400W of heat at zero degree temperature difference at the same time it's also taking in 694W of electricity which it is rated at. With same consumption it can remove 330W @ 10° C difference.
Ok now you need to be able to cool all that power. 330W + 694W = 1024W of heat coming from that system. If you can keep your cooling system at room temperature level for long periods of time maybe then you need to worry about condensation. But let me tell you when starting to play with peltier, condensation will be least of your problems. You really need direct watercooling for peltiers at that level, air is out of the question. I use this example to explain the problems to explain some things you need to understand your mileage may vary.
Also you need separate psu for that peltier 24Volts that can easily deliver required 28Amps thats around 700W atleast and safe margin on top of that.
Instead get window airconditioner and put the condensator into a box of water and run that to cool your equipment with water loop. Normal portable airconditioner around here (northern europe) take in 900W of electricity and through phase change remove 2600W of heat from the source.