I would say that 25% of my deals are now going Finance rather than standard invoice. The big advantage to finance (if the project savings honestly save more than the monthly finance amount) is the fact that:
#1 they put no money down
#2 they create for themselves a monthly cash flow profit
#3 they eliminate all maintenance costs during the warranty period
#4 even if they have the cash, when they consider #s 1,2 & 3 it sometimes makes more sense to finance and use the cash where there is a bigger advantage for them.
Hope this does what you want