We are rebuilding my studio right now and I have a window A/C we will install, but I still will only work early mornings or late evenings,
and that is because here in my area they have prime time charges for electricity, It almost triples in fees during that time.
So if I run my small studio during prime time usage it will cost more than running the whole house plus I would still be paying for the house electricity also.
I am serioulsy thinking of setting up several solar panels!!