I think this mechanic must have seen the AmEx Gold Card in your wallet, and thought you were daft enough to fall for all that lot....

None of those jobs are technical or difficult, tho some are fiddley and irritating to do...

At that rate, you can afford to take 3 weeks off work, sit on your *** for 2 weeks and enjoy the sunshine, and then take your time doing the fix-its over a few days, and you will still be quids-in I recon lol