About two years ago I went through almost this exact same scenario. I was in the process of finishing out our basement and did not want to hang the drywall until the water intrusion had been fixed. I couldn't get a deck guy to commit to a schedule to do the work so I tackled it myself with the...
Echo backpack sprayers are built fairly well for the price. Carrying around 3 gallons ina tank leaned over using one hand ***** and ruins my back for a week. The backpack sprayer solves that issue.
That extra $50 is well worth it. I reluctantly spent the extra on my honda mower and over the last 10 years I have had it I have not had one problem (with some preventive maintenance). I would pay $50 extra twice if I could save mower headaches over 10 years. Yard work is enough of a pain...