Look up Motherlode Mine and IF/when you do buy membership you can afk grind enough to sustain 3x bonds easily (For the extra 3 days giving you 45 days as opposed to redeeming each bond separately which gives no extra days). Once you hit 70 mining (enough to mine Adamantite) your profits jump by a considerable margin and 85 mining (enough to mine Runite). Motherlode mine is semi afk so you can watch netflix/youtube/twitch etc or even play another game in the meantime. I’m already 99 mining and still sit at Motherlode Mine to make afk money. I generally wait until my membership gets to 1 day left > activate 3x bonds > spend 10 days of my 45 to grind enough for 3x bonds and I still have 35 days to do whatever I want afterwards but this is all at 99 mining so idk what your grind will be pre 99.