Where is a cheap holiday (in a hot country) that you can drive from London to (prepared to drive up to 25hrs))?

My family is carrying problems with income during a impulse as well as customarily each year you go somewhere lik Israel Switzerland Canada etc though you cant means holidays similar to this any more though you wish to get out of london for a little great weather. Where would you indicate you go. Dad doesnt wish to fly so you would take a packet or a channel tunnel…