Question on replacing air springs & how easy.

[RJ03]

Hi Everyone, I've searched this site and read everything to do with replacing the air springs on my 2003 H2 83k miles. It's time, they need to be changed. My questions are, how hard is it to do? Do I need a Scanner tool? I'm relatively mechanically confident I can do this. My dealer wants $2,800, can't understand the price when the bags are $200 a piece. The dealer hourly rate is $125 so that would leave 19 hours to do the work. I've seen the Youtube video and it doesn't look like it takes 19 hours. Any assistance would greatly be appreciated. Thanks, RJ03