Playing NL200/300 could be enough to start out but you will have to manage your bankroll and expenses very carefully. If you are crushing the game you can easily make 2k to 3k a month while you grind your way up to 500NL.
This is a tough question because the answer will be different for everyone. It depends on your lifestyle and general expenses. I've copied a video below that might interest you. It's one of Andrew Neeme's vlogs discussing win rates and income in live poker. He starts talking about it around the 6:25 mark.
Stakes size depends on what you can afford ,but to make a living you should have strong control of yourself not to loose all your money .and I think you have to play for 5% of your budget so if you had like a bad week and you loose many times you still can go on untill bad luck is over
I would like to live in Vegas but I am here in Massachusetts so I'll stay here and play my games. I have traveled to Vegas a few times and found it very enjoyable. Hopefully, those who live there enjoy it as much as I did.
Las Vegas surprised me a lot the last two times I visited recently, it was not the crazy seedy city I remember from before. It really had grown and had their act together! At least in the parts I was in. I rented a car and drove out to Red Rock Canyon and it was awesome!, there is also prime development happening out there, far from casinos etc. I did see a bunch of Van lifers hanging out on the highway leading to Red Rock which I thought was interesting, was like a changing of the times.
I was wrong about how Las Vegas is now, it is an actual nice city now, that feels like more than just a place to gamble, and everyone I met was friendly, even more so than ATX in 2021.
The Las Vegas strip now just feels like a mall of a otherwise great city to me. That was my recent experience