How big is the house and what area is it located. Depending on your fundage it probably isnt too much. I have paid a lot more in the past for a nice place.
tamarindo is very nice, but it has its problems, like poop in the water and the amount of drugs that are being passed left and right, but then again for some people thats a good thing.
That seems a decent rate to me, although it depends if it is an actual unit with a kitchen and separate bedroom, or just a hotel room with a hot plate.