My dd is a Kia Spectra 5, so shoving 4 rims with tires in it is a pain. I've put tires on by hand before, but never tried removing them. Couple lessons I learned while doing it.
Tire #1 30 minutes - It's a lot easier if you cut all around the sidewall on the outside if you are tossing the tires anyway. Break the beads by putting a highlift on it and jack up the jeep.
Tire #2 20 minutes - spraying some wd40 on the beads makes it a heck of a lot easier to pull the tires off the wheel
Tire #3 15 minutes - tires seem to come off better at 60 degrees than they do at 30 degrees
Tire #4 15 minutes - didn't learn anything here except that it's a whole lot of work to save $5 a tire at the local garage.