The "portable" air conditioners which have a hot air duct going out a window are generally denigrated as inefficient. I realise that you have everything inside, generating waste heat. Probably okay for reverse-cycle heating instead. Now Delonghi have a portable split system, with the condensor sitting outside, so you just have a cable and two hoses to pass through a window instead. They claimed 4400 W cooling for 1200 W input. I found one of the all-in-one cheapo portables with 4400 W cooling, and it needs 1600 W input. I would think thought that the Delonghi still has compressor in indoors unit, so is still spews out unwanted heat.
Background: I found some cheap short-term office space (probably cheap due to poor aircon in building). Even if I spent a few thou on portables and $100 a week on cooling, I would be ahead, and then can take the portable systems with me to other premises.