Your right, I will go hungry before I top a tree. If I am broke, and need to resort to that type of work, then I need to get into something else. Ya don't top trees. I am not going to go into all the details, don't need to, it has already been done, in depth, thousands of times, Google it. I understand that there may be a legit reason, from time to time, but they are far and few between. No matter the sit, there is always another option, It is up to you , as a professional Arborist to inform the client on proper Arboriculture.Most of the time, with the proper education, they will go with what ever you suggest, if they insist, after getting the right info, then that's when I fire my client.