Knowing what I know now... and what I'm capable of at this moment. I'd probably run it one of two ways.
- I would never run more than 200 feet of hose again unless 200 feet of water hose and 200 feet of pressure hose could get me from end to end without moving the machine/trailer. If someone called me to do this job tomorrow, I'd throw a second 330 gallon IBC tote in the bed of the truck and with one on the trailer I'd X-jet the thing. I don't X-Jet often because I hate dicking with 5 gallon buckets off the trailer. Two tanks gives you over two hours of wash time.
I'd presoak, which I don't normally do, and X-jet a strong mix on the white PVC fence. I'd X-Jet it from a point where I could cover the most fence possible without moving my feet. There's not a ton you can do to white pvc with SH damage wise. I'd give it plenty of dwell time so rinsing was minimal. With X-jet you're not limited by the length of pressure hose, but you are with the draw hose unless you place 5 gallon buckets all along the fence line which sounds like a pain. I'd leave it on the trailer.
- In an ideal situation, with limited experience, I'd have priced in the biggest tank I could rent and safely tow through the grass with my Tundra, and even more ideally I'd do both sides at once with a helper on the other side passing a gun over that I was downstreaming a strong mix with. I'd move the trailer as little as possible and wash 150 feet one way, 150 feet the other. Mine doesn't downstream so well over 150'.
If that's not the case, get on craigslist and buy as many $60 IBC totes as you can haul. If it was within a 30 minute drive of me, I'd drop off one trailer with IBC totes the night before, fill them. I'd show up the day of the job with two IBC totes on the trailer and one in the bed of the truck so one is always getting filled. If it sounds like a pain in the butt to do a job inefficiently, I add an access charge. My estimate for this particular job would probably get turned down if I didn't have adequate time to rent a large tank.