Like most things in life, it's easy with the right tools & knowledge, bloody difficult without either.
If planning to try it yourself, buy a tub of proper tyre paste rather than use washing up liquid, small tub lasts for years.
Essentials are bead breaker, levers, compressor with a decent tank capacity. Wrong technique can damage the sidewall, so be careful.
I normally take 35-45 minutes per wheel from start to finish, including torqueing everything back up correctly, little bit longer if giving the wheels a good clean. I only use Tourances & find that lining up the red dots with the valve eliminates the need for balancing which is just as well as I can't balance rears myself at the moment.