I have a suggestion for management/owner of manager accounting software.
Most of the small businesses are prefering desk top free version instead of to get the cloud version. The reason is the monthly cost.
My suggestion is to give opportunity to your clients and cloud version split in to three following catagories.
One: 2-5 users - for small business and only one business.
Two: 6-10 users - for medium business and for multiple business.
Above ten users - As you already have.
If you calculate the cost for above catagories. I am sure, your paid client will be 4 to 5 times more in within few days.
I have no idea whether you will eccept or not.