How long it takes depends on the reader. Some readers are more abrupt and give shorter readings with just the facts and some tend towards much longer readings and everything in between.
From all the online readings I have had done for me over time, there is a great variety or lengths and amount of detail that comes from the card. It really varies a lot from reader to reader.
Also factored in if you do an online reading is the question of if you include photos of the cards with it. That takes longer. It means you have to take the photos, process and re-size them, and then add them in in the appropriate places in the e-mail. That adds in quite a bit more time.
As for myself, no I am not about to ask you what takes you so long. LOL I take at least as much time myself. On average about 1 hour per card, all factored in. A 3 card reading = about 3 hours.
I don't know how much you charge now but it should feel worth it to you to make the amount you are making for the amount of work going in.
Maybe what you have to think about is the
quality of what you are offering. If you shortened the process, eg took out the clairvoyant work, I would imagine the readings would not be of as high a quality. The question is, can you live with that? Would YOU be happy offering that standard of reading, knowing you could do better?
Possibly you could offer 2 kinds of readings and just let the querents decide. A basic reading, no clairvoyance at X price and a more in depth reading including clairvoyance and a higher price. You could advertise both and let the querent choose. That is what I think I would do in this situation.
Hope some of this helps.
Babs