Congrats on the DIY savings. Love the small victories and self-gratification that comes when I'm able to save $$ by fixing it myself.
I took your example a step farther. I keep a boat and camper in my yard and I periodically snap off a sprinkler heads when driving through the yard. Got tired of replacing them. So, I took radical action. I replaced the type of grass I use so that I could stop using the sprinkler system completely. I put down a grass called Tifblair. Tifblair is a patented grass that has 3 advantages: 1) requires little water 2) disease resistant and 3) grows slowly. So, I don't use my sprinkler system anymore and I only have the cut the grass half as much as I did when I had Fescue. I live in TN in a grass transition zone (southern grasses die in winter and northern grasses die in summer). I put Tifblair down by seeding it in a garden and plugging the yard. Very slow way to replace grass in your yard. But, its starting to pay dividends in that I haven't had to run the sprinkler yet this year. Plus, I'm spending less time mowing.
Sorry to take this topic on a tangent. I'm not a Tifblair salesman or affiliated with them. I merely purchased a bag of seed on Amazon for $25 and transitioned my yard from Fescue to Tifblair over a 3 year period so that I could stop wasting money on fungicides and water bills.