I am a volunteer for a US nonprofit called Amigos for Christ and we are didicated to helping the poor in Necaragua. I have built a concrete fish tank 4'x4'x60' in Chinandega, Nicaragua and I have a solar powered well that can pump 10,000 GPD on a sunny day into a 1,000 gal elevated tank. Iam in the process of adding troughs for a raft system. I want to build a greenhouse to grow the vegetables in because of the severe insect and disease problems. Does anyone have any experience in tropical greenhouse construction?