Hi birdy,
Namaste ....
I think everybody is different, but I certainly couldn`t "do" three Reiki treatments in three hours!
For a start, I like to give clients a chance to talk beforehand, then do the Reiki, then give them time to come around properly with water to drink, before they leave.
So I am looking at up to 90 minutes and sometimes even longer, per person.
And the concentration involved means that if I have clients back-to-back, by the time I get down the line, I would not be able to offer the same level of attention, which would not be fair.
I`m very lucky in that I work from home, so I can choose when and for how long I book clients. But from what you say, it sounds as if you may be pushing yourself too hard.
Love and light
philanty