Its so hard to sell a cleaning business.
It's hard to sell a cleaning business that has no employees or management without you.
Here's something that works: Sell your equipment and client list separately.
Sell the list for no upfront cost - you get 50% of the job ticket from that list for one year from the date of sale. After that you're out.
This eliminates up-front cost for the buyer and there's a performance incentive for you. You'll make the most money by getting your customers to call. Those customers are more likely to continue to use the new company if they have your backing, so the return value of those customers is increased for the buyer.
You can forward the number to anywhere, so you're not stuck in one place, and you get 50% of your annual gross as the sale price while doing no physical work.