In reply to Fernando Sommacal: i know a well run uk based expedition that provides 1:1 summit day climbing sherpa, full oxygen plus spares, sherpa support that carries some of your gear between camps, and a 3-6 week trek taking on a summit or 2 making acclimatisation awesome before you even arrive in basecamp. that way, even if you dont make the summit of everest you havnt totally wasted your money. personally, if i got to the balcony (you may even see juliet) I wouldnt regard it as a disaster.
all this for a good value $40000 USD when you consider some trips are a whacking $100,000. I would want Reinhold Messner and Ed Vuisters holding my hand for that money. He can also take you out in a scottish winter and ama dablam to hone some of the skills beforehand. alternatively ignore all the above, catch a flight, wear a decent parker and balaclava, tie wrap some sppikes to your rockports and sprint up it for $200