asesidea
What matereial of your ceiling ? I think AC cassete type is better and put on the ceiling. Thanks -

Mother knows best!
you can buy portable AC that are free standing and don't need to be vented out , they just stand on the floor.

snowman
The new portable AC units do not need to be vented.I have one in my office and it works great.

slf_made
Even though portable air conditioners are convenient and offer more than just portable cooling, the main disadvantage is that they are much more expensive and really don't work as well overall as window air conditioners. You will need a place to run the drain (bucket, tub, sink, window) and a window to exhaust the heat. Best portable air conditioners: