We use a ride on (zspray) also, but you have to remember I am not up north. For round 1 and 6, the grass here is dormant. A fert/pre combo is a waste when the grass is dormant. These rounds are sprayed on by dragging hose most of the time or with the zspray if it will save time. Our trucks have a carrier rack for the z and have multiple tanks for mixes for both the z and the 2gal min hose. During rounds 2 thru 5 it is not a big deal to have the hose reel facing the wrong direction, as the grass has greened up and we usually only spot spray.
From my research map point only uses quickest route, no matter which side of the street the customer is on. Oh and all trucks have cold A/C, no shade tree needed.