Going by some of the figures in this thread, you'll end up spending roughly £100 a week to get you 500 miles. Working out at (again roughly) £400 a month, near enough £5,000 for the year.
If you bought something cheap and economical, like this:
1996 CITROEN AX 1.0 Elation
It would cost you the same as the first month of fuel to buy, and it would be nearly half the amount per month on fuel. So if it cost you £50 a month to insure the thing (no idea on your personal circumstances such as age, ncb etc, just a rough figure) then you are still saving a fair bit, and keeping the mileage off of your Honda! Again, this is all very rough and wear & tear isn't factored into things, but buying a cheap runaround will start saving you a fair bit of money within 2-3 months.