Be at the pains of putting down every single item of expenditure whatsoever every day which could possibly be twisted into a professional expense and remember to lump in all the doubtfuls.

— Belloc, Hilaire

Beware of little expenses. A small leak will sink a great ship.

— Franklin, Benjamin

You're biggest expense is the money you don't make.

— Pante

When your OUTGO exceeds your INCOME then your UPKEEP will be your DOWNFALL.

— Unknown, Source