We don't have any palms around here but seems unprofessional to dig holes in those trees.....do they look like this when you get through?
Definitely a fair point. The picture of the holes in the palm is pretty extreme though. Palms are the only trees I will ever climb with spikes for pruning.
Unless you have a bucket truck, there isn't another safe way to do it. I have heard of people throwing a rope over the top of the palm, hitching it to the trunk of an adjacent tree, and using the SRT but I would be pretty afraid of cutting the rope.
Now that I think of it though, I have heard that you can also use a tree stand people use for hunting deer. You would probably want to get one that is pretty high quality as some of those palms seem to be 80-100 ft. I think I would be terrified to be high up in a Mexican Fan palm that is only 6 inches in diameter at the top. As someone else said earlier, those are the only trees that I don't mind having my clients' lawn guy do!