Arizona Cactus and Succulent Research Inc. is the official name of this place outside of Bisbee but people just call him the cactus man. He has acres of outdoor rooms loosely divided by low stucco walls filled with various succulents, some of them quite rare and old mature specimens. It is open to the public, he asks you to come in & sign the guestbook where there is a donation basket and he has a newsletter and website at
www.arizonacactus.com and there is a very impressive research library with back issues of every concievable relevant journal on the topic.