I don’t see how you can ask for any company to pay you the same salary for doing an entire new job for which you haven’t got any experience. You are in fact asking your boss to pay you a premium for grass cutting experience that has nothing to do with what he’s looking for. If you the boss will you accept?

If not, better wake up idea to either sacrifice take pay cut and start from scratch or be prepared to rot and retire in your job until 65.