After you winterize a few times with pink stuff, it should take less than 30 minutes. Make your own checklist. I actually carry 4 gallons at all times just in case I get into an emergency situation on the road.
Many good videos available on the web.
2008 Itasca Meridian 37H & 2015 Flagstaff T12RBST
2011 & 2012 Len & Pat's "One lap of America"
27K miles & 41 states in 13 months - Woo Woo
Yellowstone Lake 6-1-2012