How many days or worst case liters might be needed?
Some info on dosing & amounts of electrolytes in ORT products:
https://www.drugs.com/mmx/pedialyte.html#s00111839
You will need 4 - 8 liters per day of ... any of these products it seems.
1 carton of Pedialyte powder (6 packets) makes a total of 2.8 l
10 days x 8 = 80 l
divided by 2.8 l / carton = 29 cartons
Amazon price $32.94 x 29 = $955
There must be a much cheaper generic product. Some are named in the above reference.
There is a difference between Dextrose based and Rice based, for the carbohydrate content, and it has to do with gut function; I don't know if one is preferable in our circumstance.
Also in using Bicarbonate vs Citrate for one of the electroytes.