No need to hold the NEXO on their platform if you don't want to take a loan. Also, to take the loan one must do KYC, so this may not appeal to you.
Your dip buying system sounds quite entertaining. Rather like it was for me in 2016 when I lived in Bali. Only it was more like 10 miles ;)
To remain off the radar this system is best. The only other thing you could do is use LocalBitcoins.com and find a person more local to you who is willing to sell BTC. If you are able to develop a relationship with this person they might even permit a bank transfer system, which would make life a whole bunch easier for you.