There are plenty of places to visit that don't cost much; including within the UK.
How old are you? Where do you want to go? There are lots of deals. For example you can go by p and o ferries to Amsterdam, Bruges or Ostend on a two night break for £40 per person between October and march. It's a start lots of coach companies do 5 day trips for 99. And if you want to go anywhere you can get flights for a little as 20. Don't be choosy on where you visit and there are bargains is to be had, especially if you go in September