ARBOREAL GERIATRICS : Page 222

For people of modest means, self-service to their trees is less a matter of choice than of necessity. The surest way for them to avoid mistakes, of omission or commission, is (to repeat): call in a professional. If he is half the man he should be, he will, in appreciation of such paid work as you really need and can afford, be glad to lay out a program for you to follow by yourself, and to see that you follow it. Some of the happiest clients are those who, with several old trees that need skilled attention, have their treeman arrange these in priority order and then budget their therapy piecemeal over the years until all are rehabilitated.