I'm guessing this person is saying don't spend a lot of money (at first at least) until you create a suitable bot farm.
right now I've only managed too have two accounts go untouched by the ban hammer (and it's only been roughly 1-2 weeks).
I tried buying a proxy on here, and I created one account (was designated to be my mule account) and it got banned before I got it off tutorial island. My guess was it was a bad proxy.
I'll try to answer some of your questions to the best of my abilities;
1. does it matter what kind of email you have? e.g johnnysins69@outlook.com or like a "bot" jsDpe5Od41@web.com.
I do not know. I will run some tests and try to update you.
2. if I buy already hand trained accounts with no email set, and early hours of training are done. is it suspicious to suddenly change the IP to one of my proxies?
I think changing IP will flag your account instantly, but if you play on that account for a an hour or two then begin botting, i'd say it'd be ok.
3. what is the chance to get chain-banned if 2 or more accounts are on the same proxy?
so if one account on an IP is banned, it's very likely any other accounts (bottled or not) will be banned instantly.
4. last one, im gonna build a dedicated PC for my farm, botting is only CPU heavy right? (i dont want to use VPS)
I would just go on craigslist and buy yourself a cheap $30 tower unit and use that for now, then upgrade as you go.