you could try making your own. i use this 15 gallon, 10', 6 nozzle boom sprayer in a cart towed behind a riding mower. excluding the cost of the cart, the 15 gallon tank/pump, & the battery (i already had them); the materials for the sprayer were about $60 (nozzles, hoses, fittings). i can also undo the hose and attach another one. it converts to a wand spot sprayer with a 50' hose.