Might be a good time to add a little sidework to your lawn maintenance business. How about window washing? Couple ladders, long poles, buckets, the squeegee's and blades. I've seen people selling pretty much all you need in one package on CL for a couple hundred bucks plus or minus..
Start it out in your off season so you can get everything figured out, customers lined up, contacting your current year round accounts and adding it to them.. Then when lawn mowing season rolls back around, you'll have it ready to go..
On the small engine repair side where I'm at, I primarily switch from keeping mowers and weed eaters running to getting leaf blowers and chainsaws running. Still do maintenance on the mowers and weed eaters, getting them ready for next season and when that season rolls around, I switch to maintenance mode on chainsaws and leaf blowers..