This video will show how JTS Construction makes small batches of concrete with the 2 Yard Ready Mix Concrete Mixer or "The Mini-Mix" as we affectionately call it. Safford, AZ.
I don't think I would put the materials in that order. 50 - 90 % of the water first, 30-50% of the aggregate , all the cement , balance of agg then the last of the water. You get less build up the inside of the drum and the front fins , And you are assured its properly mixed all the way threw.