First, you need to have a comprehensive estate plan.
Second, you need to have a medical plan for end of life. (how much care before they let you go)
Third, any PoA needs to be specifically tailored to that estate plan and your end of life/incapacitation medical plan.
DO NOT UNDER ANY CIRCUMSTANCES THINK ON PULLED FROM SOME INTERNET WEBSITE IS WHOLLY SUFFICIENT FOR YOUR SITUATION. State laws differ. There is no cookie cutter document.
Hire an Estate Lawyer. Sit down and go over your estate holdings, what your plans are, who you want to govern your life if your incapacitated, and who do you want to make the decisions on end of life. Should your holdings be put in a trust at death etc etc etc. Wills and POAs are not simple documents. Done wrong, your estate can be blown up and you dumped in some cheap nursing home without care.
Only a fool acts as his own lawyer.