It only took four months, but I finally got the first answer key up to my “Challenge Cases”. See:
Answer Key to Abacus Capital – https://www.kahrrealestate.com/wp-content/uploads/2020/09/Abacus-Capital.xlsx
There is a direct correlation between my kids going back to school and me accomplishing any actual work.
I expect that the rest will now proceed at something resembling a normal pace.
When they’re all done, I’ll actually put them into a paid product, but for now, they’re free. Enjoy.