I've been happy with Black and Decker portable ac units (both on wheels) purchased through Amazon for the limited time frame during the summer needed here in the Pacific NW. I can't handle wildfire smoke or bad air quality, so they have been a godsend. And, we do have a handful of hot days (80+ degrees) with more humidity than in the past.
Back in 2022 finally broke down and got a unit for the bedroom as I can't sleep well if too warm. The bedroom window slides up and found it easy peasy to setup the unit. And, at the end of warmer weather or wildfire smoke it is easy to stow away by rolling into the closet. I don't keep it on all day, just prior to going to bed turn it on and cool down the room a bit. It's a Black & Decker 8500 BTU unit for up to 350 square feet in the bedroom. I've run it three summers and no issues. I sleep with a sound machine (sound of rain), so I don't have a problem sleeping with whatever sounds the unit puts out. So, I might not be the best judge of noise level.
In early 2024, decided to go with another larger portable unit for the main open living area (kitchen, dining, and living rooms). It was nice to have this area comfortable during the day and when cooking in the kitchen. I just turned on the living area unit in the morning and shut it down in the evenings. Works out perfectly in the kitchen and blows enough into the other areas. It's a Black and Decker 14,000 BTU for up to 700 square feet.
They have been good investments as the cost of the units was covered easily compared to a few nights spent in a hotel due to wildfire smoke one year. And surprisingly, the electricity cost to run them was not a shock. Usually my electric bill runs $30 or less during the summer months and with both units running as mentioned above it was closer to $60.
Grateful we do not get months of warm weather or wildfire smoke for any great length of time. So, this may be for a multiple days or few weeks a month or two during the summer. I hope this all helps @amyb.
I resisted any ac here for decades and why I live in the Pacific NW after living in heat and humidity of the South for far too long. However, the climate has changed since I moved to the PacNW many moons ago as most people do/did not have ac in their home. And, as a born and raised New Englander without ac, I appreciate open windows and fresh air. However, living in the South did teach me about keeping blinds/curtains closed and proper use of ceiling fans. LOL
Cheers!