Here's a few pictures of my little spray rig I've had for years. Just use it to spray 2-4-D on the lawn twice a year. I just got around to spraying the front lawn this morning. Did the other lawns a month ago. I built this sprayer over 30yrs ago. The wheel horse I have about $50 stuck in it after trading and selling parts of another one. The sprayer frame comes off the running gear and can be loaded into the bed of a pickup truck or I've even used it on my 3pt carrier to spray pastures and fence rows. I incorporated an electric valve for the rear nozzle. The control is wired into a trailer plug so when it's in a truck you can use the parking light switch to turn the boom off and on. I have the same on the wheel horse. Works great this way.