People probably aren't going to accept a bank transfer for those amounts from an absolute newbie - or at least they shouldn't. This is especially the case when you say "Only bank transfer!!!!" in bold.
Why? I think this is only way to send +/- 45k USD to people!Where are you located?
I can do this for cash depending on location.
I am from Europe!
If you have access to someone else's account or are scamming, it's a pretty easy way.
Meet up with someone in your area and do a cash transaction, face-to-face. Either that or do cash deposits in the other guy's account and write "for bitcoin from _____" and send him a picture of the receipt.