I don't always keep detailed time logs, but would take notes on situations like that, where there were significant delays caused by something outside my control

I don't always keep detailed time logs, but would take notes on situations like that, where there were significant delays caused by something outside my control. Not showing up on an invoice, but using those notes, I'd have a meeting with someone higher up (if there was no traction from trying to work with the people on the ground). In most cases, those situations haven't worked out well, but it seems nothing does. There's sometimes some cult of personality - "do it Dave's way", etc. To which the logical question "if Dave's way is so good, why are things broken and people are bringing in outside help to fix things?" If you can't ask that sort of question and get a good feel up front, it may be worth skipping the project (unless they pay is really good - I've usually put up with more crap than I suggest other people do because I wanted/needed the money)