You can investigate the 2 vol Margolis Elder Law Forms Manual, about $300 from Aspen Publishers. The manual is two 4" binders containing explanations of all of the forms (when and why to use), and many examples and versions of the different forms. I suspect it's a couple thousand pages (they are very thin pages). The CD is full of all of the forms referenced in the manual, and you use it to build your document. Contains multiple versions of the different forms, as well as alternative standard paragraphs which you can imbed at the appropriate locations when you want to tweak it to fit your circumstances.
Even if you decide to use a lawyer specialized in this (and there are many circumstances where that is still the best alternative), you'll be a lot more educated and would have thought through what you want or don't want/need. You can educate yourself on your own timeline, as opposed to feeling rushed while you're on the billing clock.