Fracking has nothing to do with horizontal drilling. Fracking is used to increase the connectivity of the reservoir to the wellbore, in the case of low permeability reservoir. For geothermal applications there is no reason to pick the low perm and increase the cost of well completion.
Horizontal directional drilling is a very established field, which is very technologically intensive and some of the things we can do in this area are nothing short of amazing. Basically any trajectory can be executed, including some smart things like underground loops. Couple this with electric submersible pumps (ESP), which help to increase the flow and potentially run water through several cycles to maximize the contact with hot payzone before getting it to surface and you can do many interesting things.
I've been operating home cluster (on-prem and lately hybrid with cloud instances) for several years now, running a lot of self-hosted applications for my family.
To be frank I struggle to understand what kubevpn does. While I may be missing something important, the quality of the documentation and description is lacking. Documentation is key as you are learning, so I suggest you don't use it and just focus on deploying and using k8s to host something.
IMO, k3s is the best distribution for hobbyists, by far. If you want to add connectivity to it - k3s supports tailscale now and I can confirm that it is quite stable.
My experience was different. I have a particular question, which I am yet to see any model to answer correctly and I just tried it out.
Q: "what are the major economic and earnings events next week and how they can affect SPX volatility and price?"
A: It gave a long and nicely formatted answer with clever visuals, using the right words about FOMC and inflation. Coherent reasoning overall, albeit quite shallow. But the economic and earnings calendars for next week are complete hallucinations, even the dates, so the whole analysis is nonsense: