In general, you'll face the following fees:
1) Deposit fee of the Mexican exchange: from 0 to 1,5%
2) Trading fee of the Mexican exchange: most exchanges are around 0,2-0,5%, depending on the amount.
3) Bitcoin transaction fees for the transfer from the Mexican to the Norwegian exchange: if you are not in a hurry, it's negligible (<US$0.50). I highly recommend to first withdraw the coins to an own wallet (e.g. Electrum) and then to the Norwegian exchange. In the case something goes wrong, in this case you know which side is the culprit, and can fix the issue with their support.
4) Trading fee of the Norwegian exchange: again 0,2%-0,5%
5) Withdrawal fee of the Norwegian exchange: 0,5-1,5%.
1. What is the lowest fee I can get away with by buying crypto with Mexican pesos? Do I first need to buy USD / USDT, and then crypto? How, and what exchange?
You don't need the intermediate step of buying first USDT. On
this article, some options to buy BTC with Mexican pesos are listed. The cheapest seems to be Ripio with 0% deposit nor trading fee if you use a bank transfer (see their
fees page), but be aware that they may have a hidden fee due to the difference of buy/sell price.
Binance unfortunately doesn't support NOK so you can't just use it for the whole process.I'm wrong here, see the post of
stompix below. You can do a SEPA withdraw to a norwegian account. Taking this into account Binance seems to be the best option.
2. How do I withdraw the crypto to NOK/a Norwegian bank account? Do I need to transfer the value to another crypto wallet which is linked to a Norwegian account?
For this step you have two options:
1). Centralized exchanges do normally not allow withdrawing fiat to bank accounts which are not registered to your own name. So only if you have a bank account (and most also will need your address KYC) in Norway you can register at an exchange offering withdrawals to Norway. Otherwise, the person receiving the money must register, and you'll have to send them the BTC to their deposit address.
2) If you don't have an address or bank account in Norway and the receiver doesn't want to register at a Norwegian exchange, your only option is probably a P2P exchange. Some names are HodlHodl, Robosats, and Bisq. Be aware that these exchanges are not risk-free, mostly due to chargeback fraud (criminals operating with stolen bank accounts) so know the security measures (for example, at Bisq, trade only with "
signed" accounts with >1-2 months of age).
What total fees would I end up paying in total with the tactic you think is right?
It should be difficult to stay below 2%, my estimation is 2-3%. However, as you write that the amount is quite high, it may be lower.