My wife got one of these one hose portable air conditioners, I made a vent hole for one of the
windows and last summer when it got hot tried it out, It did cool the trailer somewhat, blows a lot of hot air out of the trailer BUT air in trailer must be replaced, so it pulls a lot of Hot outside air INTO trailer,actually made negative pressure, never had a problem with condensation drain, just dont think it worked very well. seemed like I was trying to cool air inside and outside air.... think they make 2 hose models which work much like a window unit, where inside air doesnt cool the unit, but the cool room air gets recirculated..