JSnake
Useless Billy Bouncer
My wife and I just went to Portugal for a week. Lisbon-Coimbra-Porto. Can't recommend it enough and is totally doable with your budget. The really great weather months are winding down there but spring is around the corner.
As others mentioned, the WW on a Wednesday is also a great option.
As others mentioned, the WW on a Wednesday is also a great option.