My newest tank costs more than I owe on my 2021 honda civic. . I have a spreadsheet going back to 2016 and first tank. I could almost buy a tesla with what I've spent on everything: additives, fish, food, coral, equipment. Everything goes in by year and by tank. I have a general equipment and maintenance column as well as tank specific.
I know almost down to the penny what I've spent and on what (and what it is and where I got it).
My hubby has no clue and we'll just say that his ignorance is my bliss..
Funny that you mentioned this... I have a 2019 civic 2dr and I tell people, that if I could drive it, it would still be more than my car.