I’ve performed welding and fabrication work, but I did this in the maintenance field, which pretty much means that you’re not welding fulltime since you have to perform other trades. You can make decent money welding, but it depends. Many companies don’t want to pay a decent wage for many skilled blue collar trades anymore.
Your best bet would be welding for a union and/or construction firm if you want to make the best money. If you weld working for a manufacturing facility or in a maintenance setting then your wage will likely be alot less. Most guys that I knew who welded fulltime have breathing problems, and had to give it up. Also, if you don’t like the heat then welding is definitely not for you.