hi
our 1st trip to luxor in 2002 we did cairo in a day, we used a local travel agent carlson wagonlit travel (nr the old winter palace hotel) i cant remember exactly what we paid( i think but not sure it was around £130 each but its a while ago now!!!!) but it was much much cheaper than the uk charter companys for the same thing (thomsons,comos etc etc) picked up at our hotel taken to airport (about 7am flight to cairo) picked up at cairo by our guide & driver, had them in our own minivan all day. went to mosque,sphinx,pyramids & cairo museum. and as it was just us we could chose how much time & where wwe didnt want to go ( alabaster & perfume shops/factory) it was a fantastic day(exhausting) & well worth the money.
quite a few folks at our hotel did the overnight train & it was a bit of a nightmare & cairo is the maddest city ive ever been to a bit daunting to make the most of a short stay without a guide.
our last trip to luxor last january we decided to go to aswan & abu simbel instead & again used the same local travel company & again excellent. ( flew down to aswan stayed overnight then flew to abu simbel next day,back to aswan & got the night train back to luxor - about 4hrs)
any q's pm & i'll try & help.