DANM A/J !!!!! But you did a god job of it.
Here is a twist!
Who are you to degrade & rip HIS choice on where he spends HIS money?
By your math,
My net wages after paying taxes, government mandatory pension, mandatory unemployment insurance, and union dues, is about $15/hr.
900/15=60 hours for me. That's a week and a half! Almost 3% of a typical annual years income.
As a member here loves to state and all so very well it is always a perfectly valid statement;
Pick your parts, pay your price.
Your car your way! Not what someone else thinks or brow beats you into. You can suggest the obvious on cost. But seriously, bring your pay chack into it? Verse his? On how he should spend his money?