You do if you plan your estate. It's not just for assets, it's stuff like an advanced health directive (ie, what do you want if you're in a coma for a year?), and power of attorney (who calls the shots while you're incapacitated?). You want this stuff even if you're married -- perhaps especially if you're married, it could save your spouse a lot of trouble during a very difficult time. If you ever make a big transaction, or sign something that deals with $100,000 or more, you want an attorney to look it over first.

You don't need to pay them every month...just have them do estate documents and touch base with them once or twice a year so they remember who you are. You'll get their cell number.

Important to call your attorney instead of family because you might only get N number of calls before the jail cuts you off, even if nobody answers. Your family might be asleep or have lost their phone or whatever, but if you call your attorney they'll make sure to get ahold of somebody that can bail you out. (IIRC your attorney cannot bail you out themselves)