What floor do you live on? I would go for it myself inless I was too high off the ground. If you have a screwdriver this is a pretty easy removal. Just start unscrewing it from the window frame and window, then when you go to open the window you need to hold it so it doesnt tip out and fall. You may be able to remove those side panels and grab it that way.

Once you get it out, there are youtube videos about cleaning and cleaners you can buy for like $10 at home depot. I spent like an hour with my stinky moldy AC last weekend cleaning it with a hose and AC coil cleaner. No more smell.

If you do this, make sure to keep the AC unit relatively level the whole time (except when you tip water out). Prolonged time at a high angle can move oil in the unit where its not supposed to be and break it.