I have been lucky to seat "in front of the Computer" for 17 years ( I did 6 years before that as a Health Code Inspector) and making a reasonable living in an Air conditioned cube so I will respect anyone willing to do Arborist Work for living. I have been climbing (RTC) for 3 years now and have done a couple of take downs and pruning work ( on my own property) so I got a taste of the amount of hard labor involved. That work is too hard, dangerous and poorly paid ( compared to computers work) so at my age I will continue in front of the computer and let the professionals mess with the tree work.

If you are young (30's) give it a try for a while to see if that is what you want to do for living. You may be able to do it but at least you always have the computer experience and knowledge to fall back just in case the tree business does not pan out for supporting a family.