We have a flight cage too and the keets love it. They use every space from top to bottom, side to side and back forth.
They really aren't the nightmare to keep clean and scrub. The toys and perches are rotated regularly and scrubbed. The grate and tray can easily go to the bathtub to be scrubbed. When I have seeds in the tray I cover the floor with newspaper and pour seed hulls onto newspaper, roll up and throw away. I keep paper towels on the grate. Two rows of 3 blocks of standard paper towel.
To disinfect we put down the drip cloth we use for painting, empty the cage, roll it out onto the drip cloth, bring in a bucket of hot water and clean.
Its really not the impossible task every one makes it out to be. This is all done on beige carpeted floors and they are none the worse for it.
The most difficult part for me with this cage is setting perches, as I'm a bit on the vertically challenged and the cage is a bit deep. That's when I call in hubby! ;-)
This cage may not be for you for many reasons, but I wouldn't let the cleaning and scrubbing aspect be the reason you don't choose it.