I feel like you spend too much energy trying to make money from side hustles.
I know time is finite but it seems like it's easier to work 3 extra days a month to make an additional 100k/yr.
Seeing how much money you guys earn make me think I should have done rad instated of IM. Ceiling for IM (hospital medicine) is 450-500k, but it appears to be ~800k for rad. Then again, I did not want to do 6 yrs (5+1) of postgrad training.
Anyway, 400k is not that bad working 17.5 days/month from 7a-6pm when ~8 hrs is actual work and the rest of the time is spent horsing around.
If you worked a bit more, you would make as much as the average rads. I know a hospitalist who made $500K+ last year by taking an extra week of work on some months. That is the average in my group, but we only have 10 weeks off per year. The average pay for rads is around $500K, and trust me, rads earn their money. If the average was 300-350K you would see decreased interest in the field and several would quit as the amount of work would not be justifiable for the pay. I personally would be in pharma or some government job if the pay was that low. One of my best friends who skipped residency works in pharma and makes $320-360K depending on bonuses, and he is still early-career.
I interviewed at a large independent private practice group in a very desirable area that had an average minimum of 65 wRVU per day. I saw the wRVU counter on one of the docs computers. You wouldn't leave until you hit that number. Some docs even read more for bonuses, and several had to skip lunch, ate lunch at their desks, and/or stay late till 7 pm to finish the work. I believe the average doc earned $600-650 with 9 weeks of vacation. I did not take the job. But they seemed happy. My current group averages 50-55 wRVU per day, but there are no daily minimums, which I like. Some days I read under 50, and on others over 70.
If money is your motivation, you are currently doing as well as the average rad (if not even better accounting for time off and actual hours worked). I did a real prelim IM year, and I found radiology training more mentally demanding that IM. As an attending, some shifts are so crazy that I need 2 hrs to mentally decompress after work. The liability is also higher in rads. Think of what it takes to read 50 CTs/MRs and 20-60 X-rays/ultrasounds of varying complexity usually with unhelpful and misleading indications like "r/o abscess, stat, stroke", and to do this in 8-9 hours and not miss clinically significant findings. It is not trivial. I thought about doing IM and possibly GI or cards, but decided against it as I did not like clinic and found clinical work to be frustrating and boring at times (non-adherent patients, paper work, dispo, med recs, etc).
Neurosurgery makes a lot and it is not uncommon for some to make 7 figures, but the work does not interest me, and I don't want that lifestyle. On the other hand, I love radiology and currently could not see myself in another specialty.