[Rjvpicux]

If you've tried all the reasonable avenues like discussing it with your parents and such and are still not having any luck then it sounds like your only option is to get yourself a part time job.
You say all your neighbours are old and obsessed with their lawns? Why not offer to mow their lawns for cash? If you can show that you are good at it then you should have a good customer base in no time, especially if you are cheaper than getting in some other company.