Hi Julie - I am staying at Westender but there are places with lower rates....its a bit of a splurge for me.
Decide your budget range, cliffs/beach, for long stay I need a kitchenette (smll fridge/elec burners), etc.
If you post and ask for recommendations boardies will help you find a bunch of options. Give us your "must haves" as different people have different comfort levels (super rustic to fufu fancy lol). For me its seaside/seaview so that is at a premium$$$. If you are willing to stay gardenside across the road from the sea then there a some great options - usually around $500-700US per month. Staying a month is great so I hope you can swing it......my best advice is to make a strict budget and stick to it (find ways to eat/drink cheap in your room, that is the biggest culprit of spending too much). Bless