I appreciate it, Todd. It sounds like misting the AC is something we could do. (Kind of like putting an AC unit inside a swamp cooler, I guess).
The windows are on hold for now because a leak sprang up from the spigot of our water heater. After replacing the spigot, we saw it was nearly clogged with lime. I think our next upgrade will be the water heater ASAP.
The contractors Home Depot sent out quoted $2700 to bring it up to code. That was a lot more than we expected, but I can do some of the upgrades myself. Our water pressure was 95 psi, so a lot of that expense comes from a pressure relief valve and an expansion valve.
This is the replacement model we want, unless anybody else can suggest something better/easier to install.
Rheem Performance Platinum 40 Gal. Short 12 Year 40,000 BTU Energy Star Natural Gas Water Heater-XG40S12DM40U0 - The Home Depot