Is this a real reason for them to take away your business or just under that argument they are grabbing your business? You need to discuss with them, I’m sure you must have done that. There is no definition of enough money and that can not be the basis of taking away some one’s business. You can offer some sharing if you really earn well as they have helped you in setting your business. Do not fight with them as that will never take you any where. Do not waste your time and energy. If they are not convinced then best thing is to take this injustice as a challenge and establish your own business. Some one can take away your premises but they can not take away your knowledge, skills, contacts etc.