Hi i just wanted to know if it is possible to host instance completely without renting anything.
if you have a video on it can you please share it here?
You make good points here for the beginner however there are better alternatives and solutions for basically everything you mentioned here. The biggest I want to address is conflicts on your system. Generally running servers on metal is just outright bad practice. Containerize. Always containerize. There are lots of great options. Docker, podman, Lxc, helm, flatpak… hell. Snap if you must. Running servers on metal is generally is just asking for trouble unless the system’s entire purpose is for that. Also the cg-nat situation. Personally been behind it for a few years but it’s not a problem as long as you have a reverse proxy tunnel in place. Not a hard fix at all.
I do agree with what you are saying, but for a complete beginner, and a very general overview, I didn’t want to complicate things too much. I personally run my own stuff in containers and am behind CG-NAT (it’s why I gave it a mention).
That said, if you really wanted to give the new user that advice, go for it. Rather than just nit pick and do the “but actshuly” bit, start adding that info and point out how the person should do it and what to consider. Build, instead of just tearing down.