Honestly, this sounds too complicated to me, but maybe it's a good idea, I don't know. In my country, Bitcoin is quite popular, and there are local places where you can buy or sell BTC for fiat without providing ID or any personal information, as far as I know. If I wanted to make an anonymous purchase, I'd probably do it this way, by going to a place like this, but, of course, with a good reputation. You might want to inquire about the situation in your country, and perhaps there's a similar option there as well. Oh, and I think some BTC ATMs allow purchasing Bitcoin for fiat, and up to a certain sum you don't need to provide an ID. They might ask for other information, like as an email address or a phone number, but these might also be easy to anonymize (although I guess this also depends on your country).