Where is there a reasonably priced spiritual retreat in central or south america, costa rica, etc?

You can try here

https://www.retreatsonline.com/costarica/woomenmoves.htm

There seem to be a few on here.. Hope this helps..

My friend, Helen, and I are organizing a spiritual retreat to be held in Malpais, Costa Rica July 25 to 31 of this year. It will include yoga, meditation, tarot and astrology as well as outdoor activities. It will cost $1100, exclusive of airfare. If you are interested please contact Helen at 720-276-1612, in Denver.

There is a beautiful place in Panajachel, Guatemala which is attached to a children's orphanage. It's called Eagle's Nest.

http://www.eaglesnestint.org/