I think I could easily get by with a window AC unit for our bedroom. Lot less money to cool down one room than the whole house. Unfortunately, we have those horizontal sliding windows so a typical window AC unit would not work.
I usually have the deck sliding door open all night and blow cool air into the house. In the morning, I shut the sliding door and close all the blinds to keep the cool in the house. Usually, that's good enough to last the entire day and then I open the doors and put the fan in it again when it cools down in the evening.
We have ceiling fans throughout the house, so that is usually running 24/7 in the summer circulating the air. Much less expensive than turning on the AC.
Although not running the AC saves me lots of money, the other reason I don't like to run the AC is because I am usually working outside, sweating up a storm at times, and there is nothing worse than coming into a cold AC'd house and getting the chills. That's a good way to ensure you get a summer cold.

Over the years I have developed a habit of changing out of my wet tee-shirts when I come into the house, for lunch, or a break. I might go through 4 tee shirts in a day. But I don't want to cool off inside the house wearing wet clothes.
Speaking of changing out all those tee-shirts, I have on my list this summer to install a umbrella clothesline to hang out our clothes. No need to waste money on a dryer if you can air dry the clothes. Having said that, Dear Wife does almost all the laundry and she likes the convenience of just transferring the clothes to the dryer next to the washer. Maybe she will have change of heart if I get the clothesline installed out on our back deck. I really like the fresh smell of clothes dried out in the open air, but I know it means extra steps and more work for us if we do that. To me, it's worth it. But as I said, Dear Wife does almost all the laundry.

And before anyone jumps on me for not doing the laundry, I will tell you that Dear Wife does not want me to wash her stuff. I am allowed to wash my dirty clothes, if I want, but it's hands off on her clothes.

Would you believe we even have separate clothes hampers for our dirty laundry? Her basket fills up every two days, mine can go a week or longer before full. Does that make me more frugal than her? Or not?

Post your insults if you must, I can take it.