If you haven't, check out Mat Ryder's videos on YouTube. He's newly retired guy in decent shape from jogging who buys a bike and does the GDMBR while making a bunch of videos. He shows everything and at the end talks about how much he spent and how much less he could have spent if he tried harder to be frugal. You can see how an average guy without any bikepacking experience do it. You can do it too!

https://www.youtube.com/playlist?list=PL3-zVwEVdJ-UbC1DT4tSG...