People buying 15k pinball machines and tax returns are rounding errors. LOL - nope..
Most people I know who are extremely wealthy and remain wealthy are extremely critical people who pay attention to details.
I knew a CFO one who lost his crap over 3 dollar transaction fee at Bank of America. Threatened to move all the accounts
to another bank if they didn't reverse the fee. Thats just one of a a dozen stories I witnessed with Cheap millionaires.