I know some have actually done the commercial start to finish in a day, with 30 minutes flight training, and they did so well that the DPE actually paid them........
1) It takes what it takes
2) How old are you? Older students take more hours - fact of life. A 22 something with natural ability and training full time - a lot less.
3) After all of your requirements are met, hours to train the maneuvers - 10 would be on the low side, 20 maybe, 30 not out of the question.
4) I haven't been flying regularly because of travel, planes have been down, Canadian Haze and thunderstorms, summer cold, dog ate my homework, etc. And, I'm a long way from 22 years old. So no, I'm not knocking this out in 10.
If I were you, I'd take your CFI on a long X Country in a TAA or Complex plane and kill as many birds as possible. Fly 2 hours in Daylight VFR, and then wait until dark to get your 2 hour Night VFR X Country on the return trip.
Then just keep training for the Com until you hit your 250 hours.