I did not. I did climb in the Khumbu region two months ago and climbed a few 20-22,000 peaks (and smaller) worldwide. I also have friends who climbed everest.
First good source of info is at alanarnette.com Alan has great write ups on all topics related to the mountain and mountaineering. He is also active on Facebook, if you send him a message he does answer them.
Anyway, I think there have been about 6000 summits on E. I know a guy whose progression was this steep: First a climbing course on Rainier (I climbed with one of his guides from that trip, he certainly did not give a 2:33 performance), then he climbed Denali, went on to Manaslu and then summited Everest. 4 mountains in a span of about 2 years, never touched a crampon before, or since. This progression would cost in gear a few (3-5?) thousand, Rainier $1-1,800 ; Denali 7-8,000, Manaslu (or Cho Oyu for an 8000m one) about 16-20,000; Everest 30-100, 000
You have great speed/endurance, all these climbs are long, slow slugs up the hill. If your body has no big problems with altitude and you have luck with weather, it should be easy for you.
Good luck!