That is for a 5 gallon batch- just follow it as it for 5 gallons.
I just add two packs of dry bread yeast- I have not had any issues with fermentation. You can add nutrients as well- just follow the directions on the label.
It is an expensive recipe- I have found that farmers markets are a great place to meet beekeepers- chat them up and see if you can buy the stuff that is not pretty enough to package. I usually buy it in a 5 gallon bucket.