Hiya tiamaria,
Have just checked Ryanair from Dublin April 22nd for 1 week (just for example) - flights are showing as €139.84 but then you have to add on credit card charge for booking online/bags/airport check-in but these are very cheap.
Also we are going over in 2 weeks and are staying in the Hotel Almerimar - reasonably priced I think....you can get 4 nights B&B + Evening Meal (as much as you can eat - buffet style - gorgeous food and every food imaginable under the sun!!) for €340 for 2 adults.
There are apartments at Alta Entinas for rent and they are in Almerimar. Don't know what a week would cost you in one of those.
Hope this helps.
M.