I find that Buddhism,stoicism,cynicism, and Epicureanism play well together...different focuses, but not opposed.
In the book https://www.amazon.com/Road-Heaven-Encounters-Chinese-Hermits/dp/1582435235 my favorite quote from an old Taoist hermit is “the Buddhists probably meditate better than us, but I like the Tao- I use some things I’ve learned from monks”
I can recommend you look into "Road to Heaven" book. Bill Porter interviewed various hermit practitioners of Zen, Dao and Buddhism. It will shine the light and answer most of your questions.
You should read Bill Porter's book Road to Heaven: Encounters with Chinese Hermits.
https://www.amazon.com/Road-Heaven-Encounters-Chinese-Hermits/dp/1582435235
Most are members of a Buddhist or Daoist lineage that help support them. They also usually have some land they use for growing vegetables. They will go down and buy supplies from a village, too. Most 'hermits' live in networks where they support each other.
There is this book called Road to heaven you should check it out. Some of those people have lived alone for longer than you've been alive.