I can’t afford it

Can I afford it at all? I need to acquire new software for our computer network. I have to provide software for 40 computers. But at today's prices? Can we afford it at all? Do we have any other choice? I recently read about the possibility of a program lease. I only have to make sure that this option is also for companies. I could use some free versions, but can I use it again in the company? If it were my home computer, I would probably have reached this solution. But this way? I don't want unnecessary problems. After all, the penalty would be much higher than the applicable software.
Possible solution?
As a workaround, you would be able to use a managed server. For less financial costs, we should be able to solve the problems, but mainly professionally protected. For this we can also rent programs. The computer technology is so rapidly obsolete.