I'll know when I get my hydro bill if there is a substantial jump. I don't think it's terribly expensive to run. It's a low heat source that blows the heat up through the stacked trays and exhausts out the top removing the moisture from the food over the hours it's in there. Can also be done in an oven on low heat.
I didn't dehydrate the flax and chia seeds as much as I used them as part of the ingredients in the crackers which were then 'cooked' aka dried in the dehydrator and broken apart for eating.
At this point Hobo and Tramp haven't had any treats from it yet. Maybe at some point. They don't often like changes to their diets.