Just don’t get a portable unit. They suck and are just a waste of money most of the times.

Get a dual-hose unit if you get one. There are a lot of companies selling single-hose units. Those are a lot less efficient and aren't much cheaper. I would guess that in a situation where they get any kind of meaningful use, a dual-hose unit pays for itself quickly.

I don't think I'd agree that they suck, but if you can use a window unit

not all rooms and windows are amenable to this

you normally want a window unit instead of a portable unit, unless you must take down the AC unit on a regular basis. Less noise inside, more energy efficiency.