You might want to try another profession if you're looking to "make money." At this point you have ZERO welding experience (it's more than just reading on the internet) let alone have you fabricated anything that is worth charging someone money for. You do understand that, without a structured program or apprenticeship, decided to "be a fabricator" isn't something that just happens. You need to have a different attitude and skill set than what you have. You are persistent, however you are going about this entirely wrong.
You're trying to sell a service, right? How much money is there to be made? Why should I buy your product over the other guy? If you're serious about this you would have already asked yourself these questions and have a damn good answer. If you were serious about this you would put more effort into not getting royally fucked on every transaction you make. If you were serious you would not let some guy on Craigslist fuck you over and you definitely wouldn't just take it up the ass. I mean honestly, the fact that you were welding on a wooden bench with a FUCKING BUCKET OF WATER just shows that you don't actually care about or think about what you are doing.
I'm not trying to be harsh, but I just don't see it happening. Reading through all 20 pages makes me laugh, but I honestly feel bad for you. If this is something you actually want I hope you shape up and get your ass into gear, but from what I've seen you just want to sell manifolds on the internet because you think it's the pinnacle of fabrication.
Good luck sir.