Just out of curiosity, why would anyone buy the HPS unit? You would still have to do your liquid applications with a backpack or Skid sprayer? Why not go ahead and buy a ride on that does liquid also, and save all that time as well. I went from a lesco push spreader with the synergy sprayer attachment, to a used PG ultra (thanks Real Green) and went from doing an average of 20 properties a day to 30. I only have 60 properties, so I don't have a large bank to average from, but trust me, it saves some time.