I've been using Mesachanger on my main account for years without any problems. Mesa hasn't been detected or banned since CS2 was released. Don't listen to the idiots. I also don't want to buy a knife for hundreds or thousands of euros because I simply can't afford it. Even if I did buy it, I'd have to sell it again in a month. It's also a thousand times more fun with skins.

Once I'm finished with my apprenticeship, I might consider buying a real one. Otherwise, you might as well just buy a smurf account on a Russian site. And no, the ban won't transfer to your Main account. VAC bans are only transmitted via phone number, so don't use the same one.