In the end, perseverance seems to be the key here. He's not putting an incredible amount of money down every month, but still he has managed to obtain a lot of Bitcoin, 4.47 BTC from his last update.
Have you tried something similar?, maybe now thinking about doing it?, I think it's a great idea.
Yes I am doing the same strategy when it comes to bitcoin purchases. DCA is in my opinion the best form to make purchases over a longer period of time. It's one thing if you have a large amount of money today and you are looking for the cheapest possible purchase price for your bitcoin. And something completely different if you only can set a side a smaller amount every month from your salary. With DCA we don't worry about the purchase price anymore and are going to make fixed purchases every month. Having more than 4 bitcoin already is amazing and depending on the country where he wants to retire should let him buy an apartment. Finding a cheap and safe country to retire in is also my dream, because that would allow me to retire much earlier. In my country I would likely have to work until 67 or even 70 to receive my government money.