My sim Hadley did 79 unique upgrades (2.58) and made $664,407 whittling wood for a score of 1,714,170.
I agree the bugginess, especially post Laundry day, is quite bad on autonomy but i have found that only playing 1-2 hours a day on the testing of rugrats has made me less ragequitty lol so i recommend everyone just trying to play the rugrats a little slower than normal. Hopefully we have more than 6 scores as it really is an interesting challenge.