My wife's been caring for mine for years. She's ordered the "tools" that she feels she needs and it's worked well so far. My only contribution is soaking them to soften them up.
At my age, I can barely reach my feet to put my socks on, let alone tend to my nails. She also cuts what hair I have left, and trims my beard. A real sweetheart and the best I can do in return is give her back rubs.
My podiatrist has pedicure included with a visit.
They cut mine and ins pays for that. I go usually every 4-6 weeks. also he removes a corn. My new leg just is painful to bend it that much for me to do it.