Small Hempy buckets in a 20" x 36"

Last grow was tree in a 3.5 gallon Hempy bucket. This time I'm thinking of doing six,1 gallon (4L) Hempy buckets in a 20" x 36" or 50cm x 90cm. Opinions?

Check my thread rockwool hempys. That was in a similar space

Think I got about 25oz off my space, slightly bigger than yours