I have this high end residential yard. The front of the property, sides, and 3/4 of the back are dry even a day after it rains. the problem with his yard is that the back is on a hill, and there is a drain at the bottom. The thing is if i wait til the whole back yard dries, then the grass will be 1' tall. And i know he wants it cut every week. He texted me today and said it was too wet to cut yesterday. I assume because i left a couple ruts in his lawn on accident. I only put the mower down as far down the hill as i could go without rutting. The only problem is when i made a turn at the bottom the 2 front caster stuck out and left some good ruts, more or less made the grass brown because of the mud there was also another place where i thought it was dry, turns out it wasn't. I end up trimming 1/4 of his back at the bottom each time. I texted him back at 9am and he hasn't replied when he usually replies within an hour.I don't want to loose the account but what would be some good strategies to avoid this? I currently have to cut it on Tuesday mornings because i work a second job in the afternoon that can't be worked around and it is always wet. So i asked him if i could get to it on Fridays in the afternoon so there is a better chance of it drying out. here is a pic for reference. You can see the bottom of the hill to the right and it is a hell of a big hill. the pic is from last week. This week i had to cut it a different direction so that's why the casters went in to the wet spot on it. Sorry for the long post but i really don't want to loose him as a customer. And i would like some help with suggestions.