How to transplant cacti away from Boojum/Cirio and not damage roots?

Question

I have been offered 2 Organ Pipe cacti (each about 8-10′ with multiple limbs) and a 6-7′ tall Totem, as the owner doesn’t want them anymore, plus he wants to give the Boojum/Cirio tree (within 2 feet of the Organ Pipes and Totem) more room to grow. (He’s had the Boojum for almost 45 years. Now over 15′ tall, It was a 3″ high gift in 1975.) My concern is how to best remove the 3 large cacti from around the Boojum without damaging the Boojum (I believe the cacti will be more resilient). I cannot find any information about their root structure online. Any suggestions are welcome, and thank you!

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Answer 1

I did find a reference that said Boojum was easily dug and transplanted so it must not have a very extensive root system. But this one is very tall and old and you sure don't want to injure it. I would say it was a job for an arborist.

http://www.public.asu.edu/~camartin/plants/Plant%20html%20files/fouquieriacoluminaris.html